Dude....use the search button....there are prob like 20 threads about this with the same answers your gonna get....NO dont even bother sanding it down and painting it....the rust is there, its not going anywhere unless you cut that metal out and weld in a new piece. Simply covering it up wont work, it will still rust through.....it may prolong the process but it wont stop it.
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2002 3400 & 3500 GL "Ruby"-->R.I.P. 163k. My first car. Put 130k on her.
2000 3500 GLS "Robin"-->Intake,Headers,Exhaust,H&R springs,KYB AGX,Sway bars,Strut bars and more
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