I used an HVLP from Harbor Freight. Very small gun not quite an airbrush but for $8 on sale it was a steal. I did all the wing parts with it as well. I have two of them thinking it was going to plug up but it worked pretty sweet. https://www.harborfreight.com/air-to...gun-62300.html
I guess you would have to get a compressor also if you don't have one. I don't know why you couldn't use an airbrush though for that small amount of work.
Eddie