Just to add my 2 cents...
I have many small pieces of class, cut to about 4x6 inch. I pick up the glass for pennies from my local hardware store after they mess up some cut and chip or brake off a small piece. I slice it up to useable sizes to mix most anything on. (Always run some sandpaper over the cut edges before handling and you will not find any sharp edges...).
Works great for mixing epoxy, paint, etc... because it does not absorb any of the mixture.
If you run short of glass and you forgot to clean it before the last application of epoxy/paint dried, it will easily scrap off with a razor.
In addition, I always use two pieces of glass, one to initially mix part A, part B, and the dye (if used). To mix the ingredients, I use a medical spatula that my pharmacist donated to my tool box. Its stainless steel, easy to clean and flexible enough to take a 180 degree flex and spring right back. Sure makes spreading the epoxy easy. Anyway, I used two pieces of glass, the first to do the rough mix and then I transfer the epoxy over to the other piece of glass and do the final mix. I have never had a handle break loose. This I attribute to the last minute roughening and cleaning of the handle material, the blade, and even the pins, mosaic pins, and thong tube
Also, I fell this prevents those rich areas of the mix where there might be just too much resin, hardener, or dye
My next advice is to ensure you never store the 5 minute epoxy with the 30 minute epoxy. By the time you realize youve mixed them up you will probably be clamping the scales on and wonder why they do not seat
I now spray RED paint on the epoxy piston handle so I dont make that mistake again
My final advice concerns the Golf Epoxy
It is rated at something like 5 ton verses the usually 30 minute 2 ton variety. To achieve this, it requires that long set time (like concrete, if you want it strong, keep it damp so it cures slowly
). I have a friend who re-handles golf clubs and uses this stuff. Weve been able to go to lunch and he was able to continue using the same batch he mixed before we went to lunch.
I remember this being discussed months ago in this forum, you might try doing a search on epoxy.
Any case, the golf epoxy is not expensive, but you must buy it in larger quantities (my friend buys it by the quart) and it comes in cans. You will need to buy some hypodermic needles at a local feed store and fill them with part A/B if you want any consistency
Bruce Jensky