Any degreaser. Dont buy that crappy engine degreaser in the spray can. Buy some actual degreaser like purple power, or simple green. you can even use that stuff on the actual paint in the bay. I wouldnt use it on the outside of the car, but it hasnt harmed my paint on the inside, and does one hell of a job. Get a sponge, a scrub, and some degreaser and with a hose you should be all set. You can use some tire shine on anything rubber to make everything black look real clean.