I’m putting a lift kit on my 91 Jeep wrangler and while I have the vehicle stripped down I’d like to put an undercoating on the frame, wheel wells, and other various parts. I’m not looking to go above and beyond to take care of the surface rust issues i have going on, I’m more interested in a cheap and easy way to cover it up. After talking to an auto body guy, he recommended the Eastwood rubberized rust encapsulator in aerosol cans. Prior to applying the rust encapsulator is there any prep items I need to do other than making sure the surface is clean and dry? I’ve heard it helps to wire brush the area but is that necessary?