Even if you have a shorter time horizon, you will forgo significant savings opportunities by cashing out your TSP. For example, if you are 45, your $20,000 will grow to $53,855 in 17 years. Keep in mind that even if you really need the money, you may be better off borrowing from your TSP account.
Here, in NYS, rubber floor mats take a real beating during the winter. I use Hi-Temp tire cleaner (amazing stuff) and a brush to scrub the rubber, a procedure very similar to yours. Dressing-wise, I apply whatever looks good at the time, though, I've been really liking Tropi-Care's White Pearl as of late.
Weve found the best way to remove dried on wax on plastic trim with McKee's 37 Wax Remover for Plastic is to spray it directly onto a terry cloth towel and gently rub the surface. Be sure to protect the plastic or rubber trim after cleaning with a trim protectant like Wolfgang Exterior Trim Sealant or Black WOW.