[Downriver Tackle]

To the best of my knowledge, you can thin any 2-part epoxy. The amount of solvent used to thin epoxies can vary from brand or type. Glue-types are generally pretty high in viscosity and will probably need reducing. 100% solids epoxies made for coatings applications are thinner by nature and would flow right over that foil beautifully. Even beyond viscosity, cure time is a major factor for flowing over surfaces. It needs to stay fluid long enough to wet out all the surfaces properly. That's why I preach slow-cure.

As for your acetone problem, it's not just that it dries too fast. Epoxies have limited solubility in acetone. You need a blend of a ketone(s) and toluene. 75:25