Now while painting just now i tought of something

Resin is most of the time Epoxy base.. now if you use Rust o leum Epoxy paint thats your problem... if you dont want you paint to affet the other paint/materials dont use the same base.

Example i do all my painting/weathering with oil base stuff so if i want to be able to whipe of my washes without damaging my base coat i put a Acrylic clear coat in between. Aclylic wont be affected by the weathering OR the thinner i use to whipe it off with.