I also use acetone on fenders, as well as shore power cords. I've never experieced any problems. In fact, my dock cords stay there permanently, and are probably over 12 years old. Still look like the day I installed them.
As for bad advise, that is your opinion. Its up to each individual to decide if they feel its good or bad, not you. If you feel its bad, don't take it. Just my 2 cents.