Thanks for your suggestions. BTW the current "Future" coat I just bought some polystyrene sheets and will prep some samples, paint them and coat with future. Once cured I'll try to paint over it with my enamels.
Russ besides the manufacturers thinner, what is a good thinner for Humbrol enamels?
I agree with Vicious about the thinner for Humbrol, I've used Humbrol since I was a kid in the 60's when it first became available to modelers in the States, but lately I've become dissillissioned a bit by it, as I think they've changed the formulation (I just can't get the stuff to dry properly). It used to be the best paint for brushing. But in your case, I'd stay away from any lacquer type thinner and go with a white spirit, mineral spirit, or turpentine. The lacquer based thinners (such as Mr. Color or Tamiya yellow cap) may attack the Future coat. I use Turpenoid brand thinner for oils, and some enamels-- it's a synthetic turpentine (it might work with Humbrol, but I haven't tried it-- but it does work for sure with Model Master enamels). However, Turpenoid comes in at least three "strengths"-- I'd use the kind formulated for thinning. There's a mild one I use for tinting, and there's another one that's made for brush cleaning.