Can you use brake cleaner to clean gas cylinders and actions on semi autos?
BE VERY CAREFUL WITH IT! Try it on synthetic (read plastics, rubber, etc..) parts that you are going to spray in an area that you can live with it being melted before spraying the whole thing down. And as shooter said lube the h*ll out of it where ever you spray it!
On a side note you may want to try Barbasol Shaving Cream.
I actually have a question.
Is Hoppes 9 OK on polymer?
Be warned that brake cleaner will work, but the results will scare the crap out of you. I have used it on the slides of my baby eagle and USP. I almost had a heart attack when I saw that it turned them almost white! Plenty of lube later, they were back to great working (and asthetic) order. Make sure tht you get every moving part well lubed. It cleans very well. It is not a cleaner that is for the faint of heart, though!