Some time ago I started using Nitro Force to clean engines. It does a great job; sprays hard, drys quickly and leaves no residue. The downside is it's price, about 7 bucks per 13.5 oz bottle at our LHS.
I use brake cleaner to clean my lines and to clean out mufflers; it too sprays hard, drys somewhat quickly and appears to leave very little residue. They are chemically different . . . and I am chemically challenged.
Nitro Force has "Alcohols" and Aliphatic Hydrocarbons . . . OK. Brake cleaner has Methanol 67-56-1 (whatever), Tuluene 108-88-3 and Acetone 67-64-1.
The brake cleaner warns you to "keep off painted surfaces", while the Nitro Force says "safe on plastics". OK, so without trying to appear to stupid, will regular old brake cleaner do damage to the internals of an engine?? And yes, I clean them off the plane, in my hand and over the gravel.
Thanks,
Brian