How do you clean the road grime that gets in the letters on the doors and tailgate? Also, right under the door moldings, road grime accumulates and if you don't notice it when washing, you think you cleaned it pretty good. Today I was detailing my truck and sitting on a short stool, I noticed the grime under the moldings. I took a tooth brush and turtle was bug & tar remover and it took about 1 1/2 hours to clean under the molding and in the letters. Thanks in advance.