just cruised by the supercheap autos website (to find opening times) anyway in the paint and panel section i found this:
"Hichem Top Coat
A versatile 2 pack isocyanate free clear that offers a tough and durable coating with excellent gloss. Suitable for use over Motospray acrylic laquer colours, Hichem ISO free colours and Hichem 2 pack base coat colours.
Hichem 2 Pack ISO Free
An extremely durable isocyanate free 2 pack exhibiting excellent gloss and colour retention, abrasion resistance and weatherability. It offers excellent resistance to splash and spillage of acids, alkalis, salts, solvents, chemicals and water. "
here is a link:
(clicky)
whilst the quality of the paint may be dubious (insomuch as i have no idea how good it is) it pretty much removes the major snag in painting 2 pack at home. the only other sticking point is the long drying time (and hence dust-free environment)
nevertheless an interesting development.