This afternoon I prepped the body tub's bare sheetmetal to prevent surface rust from forming. I used
Metal Prep, which is an acid-etching product that removes surface rust from bare metal and leaves a thin protective coating that inhibits more rust from forming. Regular humidity in the air can cause bare steel to flash-rust, so the coverage afforded by the coating prevents that exposure.
I started in the cabin, where I treated all of the bare metal spots on the rear shelf and on the firewall, areas that were exposed when I
removed seam sealer. I also treated the entire floorboard area, which was exposed when I
removed the tar undercoating.
I wore rubber gloves to protect my skin from the acid. I sprayed the Metal Prep on using a regular spray bottle, and then rubbed it into the surface using a scouring pad.
Then I sprayed another light coating of Metal Prep and wiped off the excess with shop towels after giving it around a minute or two to work. Drips can be pretty messy, so I am always careful not to use too much.
Here are the final results in the cabin.
I followed the same procedure in the trunk, and in the engine bay.
I also treated the rear panel and both rear fenders. On the picture of the fender you can see some drips that resulted from the Metal Prep gathering in the side-molding channel and then flowing down--that's what I was trying to avoid.
And I also did the rear shelf and the front cowl areas.
