What is PU gel?

Normally sprayed with a base coat of T35 and a special DuPont primer coat. When spraying it is difficult to build up the thickness of the coat because it is very thin paint and results in a thinner layer.
it is said to minimise the effects of UV radiation. Difficult to work and takes about 4-5 days longer refinish process then T35. Very thin ( that is, thin like water) compound so possible "fish eyeing" problems during the spraying process.