I need to do some engine detailing. This thing is a mess. I think it would look really good if I were able to get in there with the right brushes. My question is if using a toothbrush or a wheel brush is going to leave the painted surfaces like the wheel wells looking all scuffed up or anything? The paint is still in pretty good condition under the hood and I don't want to make it look worse by cleaning it. What would you use to get around the painted areas under the hood?