Not sure how well this will work on aircraft; but for armor we sometimes use Terra Cotta spray paint. Rustoleum and Valspar make it in the big rattle can...one of which ought to last you FOREVER.
The tedious part is masking off stuff something I'm going through now. I'm getting ready to add the non-slip to my AFV Club Stryker MGS. Will post a message on here w/ pics once it's all done!