Once fiberglass has cured acetone does nothing to it. Acetone only eats resins when it's in it's liquid form. You can run an engine off straight acetone I've done it works.The problem with burning straight acetone in the engine is that acetone burns very clean and dry so there no lubrication in it at all but mixing with gas I would'nt see much of a problem. It may eat away at the gaskets in the carb or the fuel pump. putting in 2.5oz of acetone per 10gal would do nothing it would evaporate before it even gets down into your gas tank! The price of acetone is way more than the price of gas so it does'nt make any sense to even start to play around with that.
