@ Snipez... you can get Krylon "crystal clear" to use as a top coat. they have some for all types of finishes from high gloss to matte. I picked up a can of matte for about 4 bucks at walmart. It works wonders. I painted an m4 (which i will soon have pics of) with gloss, satin, metallic, and even a little bit of brilliant paint. The only way to describe this paintjob is underwater, icy, starwars inspired camo... if you could call it camo.
Back to the point though. I sprayed it with the matte clear and it cut 99% of the shine on that thing. (the brilliant gold emblem is the only thing remotely shiney and its pretty flat)
@ airsoftcommando... ive tried the satin and while it does the job, the matte does it much better and cost the same.