The frame will not give off any "vapor" after the paint cures. However, when you are spraying the frames, there will be all sorts of nasty chemicals in the air, and you will need a respirator and spray booth. The stuff is highly flammable too; so we don't want you blowing up your house or anything If you don't know how to work with auto paint, then don't try it; you'll just be setting yourself up for failure (and most likely a big mess). Just contact Dr. Chop and have him spray out the frames for you.