Stripping N Scale Kato Nohab diesel with Badger Mini Sandblaster.

I had better results after removing moisture trap regulator from compressor. My compressor is limited to 38 psi and I'm convinced this job would be much faster at a higher psi. The project took two hours and 30 mins. Used 32 oz. of baking soda and 12 oz. of aluminum oxide. Still traces of red and roof black. Those specs are loose dust particles and the shell is not damaged in any way. I should have shot the shell with air before photographing. I will never use stripping chemicals again.