ORIGINAL: supertib
personally I do not use any ARO..I just shut my engines down and leave them be..I dont runt hem dry I actually purposely leave fuel in them......I never have rust, and always open my engines to see a thick layer of oil coating over everything.....But this is not something I would recommend with most of the crap fuels sold today....
This is the same method I use. No rust, no problem, no ARO.
I gotta say though.....I used a generic brand vegitable oil cooking spray for two years strait on my air filters back in 2007 and 2008. Did not know any better at the time........those engines OS .18 CVR are still running perfectly today. Just my personal experiance.....