Aviation Simple Green, AKA Extreme Simple Green Aircraft & Precision Cleaner
http://industrial.simplegreen.com/in...ts_extreme.php . Works fantastic even cut with 2 parts water, cleans everthing including belly oil and exhaust stains, & doesnt hurt aluminum.... unlike most other cleaners including regular Simple green. The concern with other cleaners is if the get into lap seams and remain there they can attack the aluminum resulting in corrosion. Good luck, Russ