once you get it clean, try using a good wash n wax for frequent washing. then the dirt comes right off the next washing. also old tooth brushes bend to fit a lot of hard to reach places.What is the best thing to use to clean my engine. To clean the gunk and grime especially in the places i cant get to without taking off parts?
I have used S100 total cycle cleaner with pretty good results, a lot of rinsing is required. Lately I have been using Greased Lightening, about the same results but cheaper.