There's quite a thread on here about Spray cresting, do a search - it's very informative.
I've done quite a few for myself and a few of my buddies and it's holding up great (we all shoot WB).
Make sure that you use a clear laquer as the first and final coat, I usually give it 2 -3 coats on the last step.
I don't know if this makes much difference, but I always use a white laquer as the 1st. paint to be applied. It helps bring brighten the other colors applied next and it's an additional hard coat to adhere to.
I then apply whichever fluorescent that I'm going to use (usually two coats) and then finish up with another 2-3 coats of clear.
I've done this with both blazers and feathers and have found that they both hold well, I use the AAE Fast set gel, but others use different and have great results.
Hope this helps :wink: