Most you can recoat with a very thin layer and it will cause it to dry.
There have been many issues with this. Always make sure to mix well with a non wood or solid stick. Plastic or metal preferred, What I like to do is make a small tin foil plate to spread the epoxy out on so it doesn't gel fast, thin with 2-3 drops of denatured alcohol, don't use anything silicone around this. Heat set your paint with a hair dryer, then with an acid brush cut down to 1/2 bristles use this to draw the epoxy over the paint in a thin layer. Don't touch the plug ever after it's painted you can get finger oils on the paint. This can cause fisheyes and adhesion issues. If you mess up you can clean up with a little acetone before it dries. Cleanup only as Acetone can eat your paint if you put it on a plug. Mix to size specified. The little teeny graduated mixing cups are perfect to mix the epoxy in also if it's a real small amount. I may source these and get on the site.