I suppose you mean the outside of the engine and cars, right?
The less impact you have on the item the better. Gentle brushing with a medium stiff artist brush and application of spray keyboard air will probably get a lot of of it off. Try that first and see what it does. If they're still a lot left to get back to us and we'll figure out Plan B.
The less impact you have on the item the better. Gentle brushing with a medium stiff artist brush and application of spray keyboard air will probably get a lot of of it off. Try that first and see what it does. If they're still a lot left to get back to us and we'll figure out Plan B.