1986 Chevy C10 SWB Step Side

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Picture of number stamped in fenders shows they were made at same time. Note sure if this is a date ? Look like it could be. The stamping is D 9 on this fender. The 9 is kind of light to the left of the "D".

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The right side fender with "D" with a slanted 6 or 9. You can check for these stampings to see if they match meaning likely original, and if reproduction.

The 6 is real light to the right of the "D".

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Below is a picture of the tools I used to clean the frame. Used the die grinder first with the sandpaper wheels, they work great in the area you can reach. The grits were 40 and 80. Then I used the air, angle grinder to get into tighter areas with 3M twist lock disks- brown color for heavy debris. Lastly used a "united gravity feed hand held sandblaster, with black beauty medium blast media. Used this on area not reachable by previous tools. It did a good job on small areas. Lastly used the vibrating tool to finish sand before painting. Also used it between coats of paint lightly.

The areas to be painted were cleaned with the degreaser. The SEM Rust treatment was used in the cowl area where only a long arm could reach.

Used the painters mask, which is a must. This is a minimal level mask to protect yourself. Those little paper things over your nose do not protect you. The painters mask need to be checked for fit. Do this by placing a hand on each canister to seal air inlets, then try to breath, if you can it is not fitting properly.
It should be cleaned with mild soap and warm water after each use, returned to it protective bag for next use. I am sure their are YouTube vids to explain this too.

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The drill with cutter was used to clear the holes in the frame.

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Here are the pictures of the hammer I used to shape the metal repair pieces for the firewall, mentioned above. I am no body man, novice at this. Using "Metal Bumping" book mentioned by others here as a good resource by Frank T. Sargent for repairing body damage.

The hammer worked well for me using the chisel like end to bend the metal and the round flat end to flatten/ straighten areas as needed.

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The hammer chisel like end.

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The round end