Nathan... Well there you go then(lol) I love airplanes always have, always will.But, I am only at the slightest side of operational knowledge. It really helps to have someone like yourself to give tips and hints! Thanks...
Joe...
Depending on the paint used, isopropol rubbing alcohol will do an amazing job dulling the finish. Now, that being said, some paints will not thin with alcohol and will make a right nasty mess if tried. You have to just experament to see. Most all Tamiya acrylics and Model master acrylics work very well with alcohol and even better with denatured alcohol as a thinner.
Pollysol and I think Mr Color will not. The almost act like enamels accidently dipped in water. With them its water only or their brand of thinner. I almost never use enamel any more, The odor and clean up is the reason. Next time you have a bit to experament, Spray or brush some alcohol on the finish and allow to dry, Careful not to over do, It could remove paint if applied to harshly, You just have to play around with it to get the results you desire.
Your friend
Doug