Tom I had two very large hangers one for Jet storage and one for maintenance. Both were coated with a seven coat epoxy process without the chips, similar to my garage (which had chips) in Scottsdale. Never had a real problem, even with skydrol. Which will eat the paint off most things. Maybe a little tire marking in the hanger, which cleaned off.
I had my garage floor done with the epoxy with chips about 2 years ago. I certainly can't get my Newell into it but I have had excellent wear out of it. I had concrete paint on the garage floor in my previous house in the 1980's and it was TERRIBLE. Worse than just leaving it bare. The multi-coat epoxy was one of the better improvements I have made to this house.
My employer uses Stonehard for the cleanroom floors. Bullet proof. But as others have stated it's about a five or six step process, and it's not cheap.
Richard and Rhonda Entrekin
99 Newell, 512
Maverick Hybrid Toad
Inverness, FL (when we're home )