Quote:

I wanted the undercoating removed from under my 55 Chevy BelAir. I have a Media Blasting setup and used Baking Soda to remove a 12" square area in a half hour, it just seemed to 'melt' and roll the stuff up like gum. I opened a bag of Grit-O-Cob, ground corncob. I ended up with the same results as what Challenger1 ended up in about the same amount of time (3-4 hours). But his process would be an easier and cheaper one for just anyone to do. My process worked great for me because I have the blaster, compressor, and access to cob, whereas I would have had to go out and rent a steamcleaner. Just more options to throw out there.



Many ways to do it.
I like pressure washing first before media blasting because it allows me a very light media blast to get the metal bare and I'm not blasting grease and oil into the metal. I use less media too which makes cleanup easier.

I have been media blasting for like 25 years.