Don´t worry Theomar Plus, I will definitely experiment first with some random piece.
My ruins and buildings are too precious to me!
I was pretty sure the paint will seal the vulnerable polyuretane but still wanted to be sure before trying it.
I used the spray paint to melt insulation foam, when I was doing... cave or something like that. I got nice rounded shapes by using propellants.
Mixing glue and paint is a good idea, Arli.