I’m replacing a section of the inside of my truck cab floor. I’m doing butt welds with about 1/4 inch filler pieces and I’ve ground down the weld lines and now want to put primer on the weld lines. I’m going to start on the underside of my truck cab floor, the underside has this dull grayish looking? paint or primer and I’m wandering if this is a primer paint or what?
Picture of my underside of the truck cab floor
Any help would be appreciated
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