[mongocanfly]

I have the doors off my truck and completely disassembled and ready for sandblasting...I'm not blasting inside the door cavity but I do want to coat inside the door with lizardskin..its got something sprayed in the center of the panel that looks like undercoating...I want to completely remove it but not by scraping or blasting...is there a good chemical that will remove it...its about 1/16" thick...