In 12 years of working in motorsports It's quite rare that we have time to get something off to a proper paintshop.I couldn't tell you how many times I've spary bombed a high end car minutes before hitting the starting grid

you'd be amazed at what you can accomplish with spray cans and very little money.
While I havent used these tips and products on a airplane I have used them in automotive,marine and other misc projects with excellent results and I wouldnt hesitate to use them on a plane.
If you're looking for something to either add a textured coating,add some sound dampening or for a durable chip resistant under coating that can be painted over.
http://www.3m.com/product/information/R ... ating.htmlIf you want to see it in action chances are its on the rockers of your car.It runs about 20$ a can,but once you use it you'll find a 1000 other uses for it.
For paint if you dont have a gun and compressor,or for small parts your local automotive paint supplier should be able to make you cans of Acrylic urethane in any color you want.It's a 2 part paint that usually comes with a plunger in the can to activate it before use.
For a clear coat from a can that will give you amazing results that sands and buffs like a "real"clear coat take a look at this
http://www.repaintsupply.com/pd_2_part_2k_aerosol.cfm I've used it on my Audi to do a few touch up repairs and color match a few items with great results.Granted it does take a little extra elbo grease and compound to get it to professional A level results.
As far as plastic items go I'd really have to know what type of plastic they are to give you any advice that would net you a long lasting end result you'd be happy with.But pretty much anything a automotive body shop uses can be put in a can and sprayed at home.
As with any paintwork the end result is in the preparation and before trying anything I recommended on costly aircraft parts.Grab a can or two and try your hand at it on some scraps or small pieces that can be easily stripped to start over.
If you don't feel comfortable tackling something like the panel,send it off to be done and in the meantime do all the small parts yourself at home and save a good bit of coin while ending up with a nice results and colors that match
