I have not tried that either Ron, i use famowood and it will dry out if it sits a long time, I put the can upside down so it seals the lid better with itself. It helps. I do have to thin with acetone on occasion though. I try to buy small cans, but I go through it eventually on cabinets.
I like the plumbers epoxy for plugs.
I use it on all the plugs that I need to do any filling. The stuff is great, super hard when it dries. There is nothing scientific to it. Pour some powder, add water until you like the consistency. If you use it, make sure you don't overload it or you will be sanding your ass off!