Hi William, it will not harm any of your painted surfaces. Just wash it off with simple green or Dawn dishwashing soap. There are no solvents or detergents in our product
But do it very soon before it takes up any set. In any case I believe it can always be removed, but later on they take us stronger solution. Call the New Hampshire oil undercoating place and they can give you specific directions.
Any oil dissolving soap removes it.
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