I have a 71 chevelle that I have stripped down everything to the body. I was going to take the body off the frame now, but after searching this forum it sounds like I should do the body work first. My question is can I powerwash the body inside and out? Lots of dust and dirt. How do I go about this without causing additional surface rust in between panels and in the hidden areas? Also, what is the best way to remove the undercoating in the wheelwells and under the body? Thanks. I am new to this, but have searched the forums and am amazed at how much great information is there. Great site!!!!