Hey everyone sand blasted my floor pans yesterday but im not sure it work like it was supposed to?

It removed some of the rust and paint but i thought it would really remove paint and rust quickly.

Maybe im mistaken how long should it take?

I have a b&s gas 4hp 125 psi compressor i used.

 

Did you ever get this figured out? I know different medias make all of the difference in the world.