yes, cover those and spray everything down with purple engine degreeser, then let it sit for about 2 or 3 minutes and pressure wash it off. no toothbrush needed. if you dont have a pressure washer use one of those do it yourself car washes and use the rinse setting. it will work great. if you wanna get the underpart you will need to jack it up, and the frown upon that so dont get caught.