Ive read all the tricks for applying Top Flight Lustercoat and it still wont go on smooth, has an orange peel effect in it.
Tried applying Top Flight clear, 2 light coats and a heavy one, still has orange peel (fiberglass cowl)

Ive thought about spraying clear laquer over the Lustercoat clear but would like to know if Lustercoat is compatible with Laquer, Ive tried this on an old cowl, it looks good so far but its only been a few hours, anyone know what the long term effects could be?

Here is a paint "compatibility chart" that should be of help.

Ive seen this, the problem is that nobody knows what kind of paint Lustercoat is.

This may be a silly question, but have you tried asking Topflite about any compatability issues? I should hope they would know. If all else fails, spray a 'test' piece and see what happens.

There are hints that Lusterkote is a lacquer and not an enamel. First, it dries reasonably fast. Then there was once a tip in T/F's magazine ads about spraying some in a small container so you could brush it in small places and the tip mentioned lacquer thinner.

I was using the flat clear to fuel proof an airplane that was painted with Krylon colors. BTW, Krylon spray cans are SO nice to use and they cost about half what Lusterkote and other hobby paints cost. But they need fuel proofing. The Lusterkote can would occasionally spit a big drop in the midst of the fine spray and on an aluminum color it made a dark spot. I was pretty displeased by this but I tried holding the wing up higher and spraying upward at it - this seemed to help but I'm not certain if the idea was really working, that is, if the big drops just didn't reach that far upward or whether I was just lucky and didn't get any spitting that time. Another buddy said he had better luck by swirling the can for a full 5 minutes before spraying instead of the 1 or 2 minutes the directions call for.

Still another buddy recommends warming spray cans of paint in hot water before spraying. I keep forgetting to try that one. (Maybe I should put post-its on all my spray cans!)

Try Ultracote paints. They don't "spit" and (IMHO) "lay better" than Lusterkote.