Saving quarter panels

I have a bud back in rural Mo. that has a 40 acre old car boneyard. He is a Ponyac guy but still a good guy. He has a couple of Ponyac survivors like a 67 Firebird and a 65 Goat. He told me once, they had perfect trunk floors, etc because he kept the floors and surrounding area coated in used motor oil. (He always smelled like used oil!) really.....:rofl: