I am going to redo my back ground and have a few questions.

I have a non toxic clear coat called triple thick that i originally used for clay, but was wondering if you thought it was safe since it is non toxic.

Also, can i use something toxic (paint) if it is completely covered in aquarium silicone or a non toxic sealant?

One more, Can i use wood or sticks from outside if i boil/clean them?

Thanks!!