What i found after taking my rear fenders of is this...Someone sprayed under coater..you remeber them days when everyone was getting the Miracle under coater deal! Well when these fly buy night under coater salesmen were haveing this undercoater applied not much profesionalism was going on, most of them would take the hose and blindly shoot this product with out looking,and made everthing a mess.So when i took my rear fenders off..the only place that was rusted was were they under coated,..a perfect half moon of rust and under coater.Now i am using 60 grit to sand off the what i call Asphalt...same with my inner fenders to cowl..its a mess. The product is much better now,I am under coating all my fenders now while they are off, but I am sanding them down to bare metal ,,priming 2 coates,then useing 3-m under coat 2 coats.
