RE: Trim solvent
Acetone is not the same as the monokote trim solvent. I tried acetone but it evaporates too quickly to be useful. The trim solvent works well but is tricky to get the right amount. If you use too much it turns the adhesive into a gloopy mess that oozes out when you try to press the trim piece into place. I found that the best technique for me was to put some on a cotton ball and wipe a thin film on the surface and then press the trim into place while the solvent is still damp. Contrary to some claims you cannot easily reposition the piece once it touches the surface.
For large trim pieces I like to use windex as described by campy. You can slide the piece around to get it positioned just right and after you squeegee the excess out, the piece is tacked in place and will stay put until the windex dries. After letting it dry for a day or so go over it with a warm iron. I have planes that have been flown several seasons with no lifting of the edges of the trim.