|
Hmmm...try soap canon loaded with dishwasher liquid? That stuff is expected to loosen grime without touching the dishes, right?
I would expect that stuff to sap oils from your paint and such though. You'd probably have to condition your paint after something like that.
Maybe try several passes with regular car wash soap in a soap canon several times?
Dunno. At this point, your guess is as good as mine.
|