The Home Machinist!

We've used this process at work for grease & pitch cleaning. The contractor we used spends most their time in Norfolk cleaning Navy ships/subs. The process itself is pretty neat. The dry ice is in pellet form like grains of rice. When is hits the dirty surface, it sublimates (straight from solid...

Erik:

Check out http://www.metalshapers.org/ for pics and advise on gas tank fabrication, etc, etc. You'll spend hours on this site - trust me...