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Polishing concrete - Forno Bravo Forum: The Wood-Fired Oven Community

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New Forno Bravo Forum Feature

Forno Bravo Forum Community,

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
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To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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Dome Installation Video - Casa / Premio / Modena

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For many of you who bought a modular oven, you may have asked how we put the domes together when we build them. For those of you considering one of our ovens, we shot a video to make your install easier.

Check it out on our You Tube Channel.

https://www.youtube.com/watch?v=-7q7...jSniYogfUra06Q

If the link doesn't work, simply go to You Tube and type Forno Bravo Channel. The video title is How to Set your Forno Bravo Oven Dome Pieces.

Thanks for participating in our Forum. We will have more video content available soon.
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Polishing concrete

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  • Polishing concrete

    After my first attempt at grinding and polishing a concrete decorative arch using a 4" angle grinder and an orbital sander with wet and dry paper, I decided to lash out and purchase (Ebay), the correct machine. The first attempt turned out OK but took way too long. This machine makes the process way easier. The new machine is basically a 5" angle grinder with a water feed through the main shaft, variable speed control (a standard angle grinder is way too fast) and an electric safety cut out. It takes diamond pads that fit via velcro from 30 to 1500. I am extremely pleased with the results but still have to do the sealing and waxing. Big thanks to Stonecutter and Gulf for leading me onto this fascinating technique.Gulf and Stonecutters threads contain great details and pics.If looking for more info try "hand pressed concrete" or "concrete countertops"
    Last edited by david s; 05-18-2013, 04:05 PM.
    Kindled with zeal and fired with passion.

  • #2
    Re: Polishing concrete

    You will be pleased with that machine the more you use it too David. It will definitely elevate the look your pieces. Unless you want a very shiny surface, most of the time you can work from 100 - 800 grit...then the buff pad. And most diamond resin pads should be max rpm 3500. Metal vitrified are more aggressive.

    EDIT: The RPM range for diamond resin pads is around 3000 - 5000 depending on what type (wet or dry ) and the brand. The 3500 rpm number is a safe average....and it is also the maximum for diamond profiler bits from Alpha
    Last edited by stonecutter; 05-19-2013, 05:15 AM.
    Old World Stone & Garden

    Current WFO build - Dry Stone Base & Gothic Vault

    When we build, let us think that we build for ever.
    John Ruskin

    Comment


    • #3
      Re: Polishing concrete

      Thanks,
      I feel the speed required is around halfway between it's max and min, is this correct, I really have no idea. When I ordered the machine I forgot that it would be a 110v. We operate on 240v so I had to also buy a step down power converter.No matter, I can now get more 110v tools. Could not find any small concrete polishing equip in Australia. No wonder we have no manufacturing sector left when you can't even obtain the right tools locally.
      Kindled with zeal and fired with passion.

      Comment


      • #4
        Re: Polishing concrete

        Looks great! to me David,
        I have been doing "work a rounds" to keep from having to grind large aggregates. I have been using just wet sand paper. I will probably buy the right tools for any future projects. (like her kitchen counters ).
        joe watson

        "A year from now, you will wish that you had started today "

        My Build
        My Picasa Web Album

        Comment


        • #5
          Re: Polishing concrete

          Gulf, I have an Alpha VSP-120 for the last three years, and it's a great tool. Reasonably priced too.
          Old World Stone & Garden

          Current WFO build - Dry Stone Base & Gothic Vault

          When we build, let us think that we build for ever.
          John Ruskin

          Comment


          • #6
            Re: Polishing concrete

            Thanks for the tip Stonecutter,
            There are several brands out there on the market. For someone like me who doesn't know one from the other, it is great to have a reference.
            joe watson

            "A year from now, you will wish that you had started today "

            My Build
            My Picasa Web Album

            Comment


            • #7
              Re: Polishing concrete

              No problem. There are a bunch of them out there, Makita, Metabo, Flex and Alpha are a few of the bigger names. I chose Alpha because they make great profile bits and have a solid reputation...which I can vouch for after what I have experienced.
              Old World Stone & Garden

              Current WFO build - Dry Stone Base & Gothic Vault

              When we build, let us think that we build for ever.
              John Ruskin

              Comment


              • #8
                Re: Polishing concrete

                Gulf,

                Mine is a 5" Harden paid abt 165 for it most important is one with a gfi they actually sell them on the E site without gfi crazy you got a running stream of water during the whole process.
                Russell
                Build Link............... Picassa Photo Album Link

                Comment


                • #9
                  Re: Polishing concrete

                  Without hesitation I can say, stay away from the Secco polisher. I bought one about 4 yrs ago knowing I would only use it for a couple of projects, so price was everything. I got a whole kit with 10 or 12 pads for $149 from an ebay dealer. Very cheap water feed components that leak terribly and then rupture without warning. Plan on rebuilding immediately if you buy one of these. The deal killer is the sensitivity of the inline GFCI. You will receive a shock (many times) without warning thru the trigger and/or the water supply valve. The first few times scare the hell out of you, I thought I was about to be electrocuted. The first zap I actually dropped the tool and jumped back. Being an idiot who has never been scared by any tool, I proceeded. I came to realize the zap was about the equivelent of being zapped by a 120v light switch or outlet.
                  The dealer was pretty crappy, telling me it was due to the GFCI used and what I was experiencing was normal and the shock I was receiving is not considered harmful (and it wasn't)
                  Anyway, these things are still being sold on ebay as well as Amazon, I guess no one has died yet, but I have read many reviews stating the same experience.

                  Buyer beware, stick with the above mentioned brands.

                  RT
                  Last edited by RTflorida; 05-18-2013, 10:50 PM.

                  Comment


                  • #10
                    Re: Polishing concrete

                    Originally posted by RTflorida View Post
                    Without hesitation I can say, stay away from the Secco polisher. I bought one about 4 yrs ago knowing I would only use it for a couple of projects, so price was everything. I got a whole kit with 10 or 12 pads for $149 from an ebay dealer. Very cheap water feed components that leak terribly and then rupture without warning. Plan on rebuilding immediately if you buy one of these. The deal killer is the sensitivity of the inline GFCI. You will receive a shock (many times) without warning thru the trigger and/or the water supply valve. The first few times scare the hell out of you, I thought I was about to be electrocuted. The first zap I actually dropped the tool and jumped back. Being an idiot who has never been scared by any tool, I proceeded. I came to realize the zap was about the equivelent of being zapped by a 120v light switch or outlet.
                    The dealer was pretty crappy, telling me it was due to the GFCI used and what I was experiencing was normal and the shock I was receiving is not considered harmful (and it wasn't)
                    Anyway, these things are still being sold on ebay as well as Amazon, I guess no one has died yet, but I have read many reviews stating the same experience.

                    Buyer beware, stick with the above mentioned brands.

                    RT
                    Mine is from Pacific Rim Building supplies inc. I hope it isn't one of the dodgy ones.
                    Kindled with zeal and fired with passion.

                    Comment


                    • #11
                      Re: Polishing concrete

                      Originally posted by david s View Post
                      Thanks,
                      I feel the speed required is around halfway between it's max and min, is this correct, I really have no idea. When I ordered the machine I forgot that it would be a 110v. We operate on 240v so I had to also buy a step down power converter.No matter, I can now get more 110v tools. Could not find any small concrete polishing equip in Australia. No wonder we have no manufacturing sector left when you can't even obtain the right tools locally.
                      That may be OK David. My polisher has the variable speed dial numbered 1-5 (or 6..can't remember) and I don't use it higher than 3.5 for what I do, unless I am sharpening my carbide stone chisels.
                      Old World Stone & Garden

                      Current WFO build - Dry Stone Base & Gothic Vault

                      When we build, let us think that we build for ever.
                      John Ruskin

                      Comment


                      • #12
                        Re: Polishing concrete

                        One more thing David and anyone interested. Get some diamond hand pads too. They are better for relieving edges, inverted surfaces ( after install, or keeps you from having to flip your piece) and sand small detail work (profiles). They are a compliment to the polisher and will help you turn out some clean work.

                        If you look at the pieces in my thread, you can see examples between the finishes using hand pads and a polisher. The watertable pieces on my wfo are all hand sanded to 600, were as the fp hearth is 3000, then buffed. I have yet to seal and wax the watertable, that will make them a bit more polished. The two finishes are like a honed vs polish.
                        Last edited by stonecutter; 05-19-2013, 06:13 AM.
                        Old World Stone & Garden

                        Current WFO build - Dry Stone Base & Gothic Vault

                        When we build, let us think that we build for ever.
                        John Ruskin

                        Comment

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