I think a good thing is to cut the lead a little low before the epoxy is applied. The reason for this is many times the lead is high, for some reason the factory paddled it out and then kinda left a "patch" and didn't cut it down nice and flat. So if you epoxy over that, and you plan on making the car real nice, you will have to cut the lead and end up with the same bare lead.
So, if you check it and cut it down with 120 grit if needed. Then after epoxy you can level it out nice with a skim coat of polyester if need be.