I may have to try out GG Rubber Prep, I`ve been using Meg`s Super Degreaser for cleaning tires along with a stiff bristle brush. I feel like I go through a lot of product with this though (as it seems to "melt" off most of the old grime/dressing, it`s hard to not want to let the product do the work).
How do you guys use Rubber Prep, just wipe on with a grout sponge and wipe off with a sponge or rag?
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