The PPG Concept line is compatible. I have used it to paint the trim colors on 3 all white Comp-arf planes. The colors may also be available from comp-arf plow the accessories area of the web site. I have gotten their white to do seam work. Thety don't sell the reducer but the reducer intended for the PPG Concept line of paints is compatible. The Concept paints are glossy and fuel proof - don't require a clear coat. I imagine that other brands of the same type as Concept will work also. The primer usable with Concept paints will also work on the existing factory material. The name escapes me know but the paint store can tell you what works with teh Concept paints.

Good Luck, Tom