Pressure

I polished lenses on a Mazda about 2 years ago. I can't remember the name of the product but they gave you soft foam pads to but in a hand drill. You sprayed the lenses with soapy water put their powder (probably an abrasive) on the pad and polished away. It worked very well. Lenses looked like new.

It"s also a great idea to put Anti-Sieze on your cars lug nuts. Ha Ha Ha I wrote lug nuts.

How old is your battery? Its possible that an old battery will not supply enough power to the FI under load. Hi octane gas burns slower than regular and will lead to fouling in a relativly low compression engine such as the BB.