To do the inside and outside in full I think 2 gallons would do it. If you wanted to scrimp then I would buy 1 gallon and 4 quarts...then you can either return or store whatever you have left of quarts. I know a buddy of mine and myself split a gallon...I did my rocker panels(2 coats) he did his boulder bars and part of his tailgate(2 coats) and we still had about a half a gallon left.

I just touched it up after 3 years, and did my rear bumper with about half a quart.

Steve

'97 Rodeo
3.2L V6
DOR 3" lift, 3"BL, DOR Boulder Bars, Tera-Low's, 33x10.5,Surco Safari Rack, Cobra CB, Rancho 9000's....andnNow with Half-Doors for the summer