[Perfectlap]

Get a PC orbital polisher. They sell them at Lowes. It'll be well worth the result before placing a for sale ad. Its funny how much a solid detailing job can jump the price of a car, particularly one sold sight unseen through the internet.
And of course you can use the PC on your Porsche. This is a must have piece of equipment for a black car IMHO. You'll need to order a flexible backing plate and
and a polishing pad and buffing/finishing pad. I recommend Menzerma Intensive Polish or one of the Optimum polishes. I've seem miraculuous transformations with these products. And the Jeep is only 7 years old, there's a brand new finish under all that crud.

besides,Taking it to a detailer will cost you the same price of buying the PC.