Well the oil pan was looking pretty weary on my 01 F-350. I gave it a tuoch up in 07 when the pitting begain, but it just did not hold up. Today I spent three hours with the die grinder, and mini beltsander, removing rust, and scale. I was fully exspecting to find a hole rotted thru, after the process. I had the wife pick up some navel jelly, during her erands. I brushed on a few coats here and there, wiped down and repeated. I wound up whit four pits, that needed digging out, using a 90* pick. Picking, and wire brushing finaly left the metal clean, for paint prep. Used Duplicolor engine primer, I know it's tough to remove when you want it off, so it has to be good Will be coating the pan with PM-13-A to seal it up. A lot less, than a 2K plus pan swap.