Yeah, they'll come apart OK, I've already made a repair to a small section that was damaged by the plastic grommet that the mounting screw fits into, water had got in between the perspex, and the decal, a neat repair by the way, I used a compass that has a scalpel blade attachment, cut and removed the damaged section, then did the same to an old plate that was kicking round, took a few goes mind, a little heat worked wonders, then carefully "let" the new section into position, all that's visible is a feint line, but the yellow background matches perfectly, as soon as I get the stencil made, and my number transfered, I'll bite the bullet!
Tom