Cleaning (course sand) blasted metal

C

C10chas

My local Tractor Supply was sold out of the 40/80 grit sand I use for blasting, so I was forced to purchase 20/40 grit and the blast texture turned out very deep/sharp.
I am anticipating shredded towels trying to clean it....
I planned on hitting it with 710 to help remove any remaining GM frame wax/undercoating residue, then the 700 WB afterword.
Any suggestions?
 
I was in the same boat a few months ago. I used the 20/40 for about 15 minutes, and decided to wait until I could get some finer blast media! I would hit the panel with 80 grit on a DA to knock the edge off, and then clean it.
 
Use a scotch brite pad and an air hose at the same time to clean off the rag fuzz. I agree, it might not be a bad idea to smooth it with a da. If not, make sure you put on two coats of epoxy. Just one might not fill the blast profile, leaving the "peaks" unprotected.
 
I could hit some of it with some 80 on a DA, but it's a frame with lots of areas that would not be accessible to one.
 
mix up some dawn soap and put it in a bug sprayer. soak it down and use a white brush on it then rinse. it will get it clean.
 
All blasted and washed with Dawn, ready for epoxy! photo (3).jpg

photo (2).jpg
 
One thing to consider when priming something with a coarse profile is give each coat of primer plenty of time to lock up between coats-this will give you better build on the peaks and edges.
 
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