Has anyone given anything like this a try?
https://www.duplicolor.com/products/fillerPrimer/
http://www.youtube.com/watch?v=a2ZxtsvN9p0
http://www.walmart.com/ip/Rust-Oleum-Filler-Primer/16816077
http://www.eastwood.com/spray-max-2k-rapid-filler-primer-gray-aerosol.html
http://www.plastikote.com/products/Primer/Flexible-Spot-Filler-and-Primer.html
wonder what the adhesion would be like?