Quoted from MarkG:
I'd like to learn more. How much do you need to buy at a time, shelf life, working time, tips, hazards, etc. Maybe that deserves its own topic on pot metal repair?
Mark, Probably the West System White papers can give you a better idea than i can:
I have a gallon of resin and whatever hardener size goes with it, I think it's a quart. The pumps are very handy. For small stuff around the house you might want to go with a smaller size than the gallon. I think West will tell you shelf life is 1-2 years ( i didn't look it up) but i have product for 5-7 years still works fine.
It's very much the same as using polyester resin and glass, but the epoxy is a much better resin than the polyester structurally, It doesn't stink as bad either. Some few people have allergies to epoxy, Luckily i do not... Read Precautions on West site.
The key to that kind of layup is to keep the the layup " Lean" meaning as little resin as possible to fully impregnate the glass. It takes a bit of practice cutting the glass layers, and after a while you start to feel a bit like a tailor.
Working time is pretty long, there are two different hardeners, Fast i think is 15 minutes, Slow about 30 minutes. The pot life is effected by temp Cold =longer hot= shorter
cover your workspace with paper, get 10 disposable quart cups in the paint department at HD and rotate them. Ie. once you mix a batch just let it harden and then you can pop it out of the cup. Try not to scratch up the inside of the cup then the batches will pop out easily.
because the reaction is exothermic ( it gives off heat) and the heat shortens the pot life, Be careful keeping a bunch of it in the pot. you will find that the epoxy you quickly spread out on the project has a lot longer working time than what sits "cooking" in the pot. Sometimes i take the pot and spread it out thin on on the work quickly, then come back to move it around later. this gives a longer life than leaving it in the pot.
West system sells stir sticks, get a bunch they are great. They pop out after it hardens too. https://www.westsystem.com/application-tools/reusable-mixing-sticks/
Use disposable gloves, you will go through a bunch.
I like the Light filler (410) Mix up a batch of resin, then add the filler till it's like peanut butter, The best wood filler ever!
You can use Epoxy to make anything! Burt Rutan made a plane that flew around the world! Your mileage may vary...