undercoating

my new 74 duster has the whole bottom done. im not messing with it. its nice and clean. my 69 dart only has it in the wheels houses and bottom of the inner fenders. nothing on the floor. it is like a tar base so pretty much any solvent will cut it, but then you have to seal with a gooey mess and the fumes plus the cost. wire wheel on a grinder rips it off but sends it everywhere. heat gun seems to be the best method. no real fumes and once you scrape it off it hardens back up. on my dart i cleaned it up real good and gave it a few coats of oil base rust oleum gloss black to seal it and make it easier to keep clean.