Sorry about the slow ass reply, been too busy to get on here
anyway...
LM is fine with Solvent paint, you need to make sure it's on quite thick though, ( the LM ), I've used this stuff for 10+ years while I was doing crash helmets, they were all with solvent based paint. However I was putting it through an airbrush so would have been thinner coats than you'll use with a spray can.
I'd suggest 6 decent coats of LM. When you're doing it don't load the paint up, as has been said above thin coats, real thin, it will dry with a little heat from a hot air gun / hair dryer. Make sure you work dark to light, if you can't back with white and silver to make sure it's covered.
Post up how you get on, someone else might find it useful.