Use port15 on fenders?

[ntty1]

i just bought two new front fenders for my 69 charger. I am wondering what I should put underneath the fenders. Undercoating or Port15? Or does anyone have any other suggestions?

[hemi-hampton]

POR 15 is for old rusty Fenders. Not for brand new non rusty Fenders. Put Undercoating on them. LEON.

[Silver R/T]

if there's no rust Id put epoxy primer on there and then undercoat them.

[4speed]

 

[BigBlockSam]

hi

i do the inside of the fenders in eastwoods rust encapsulater. i like the  way it looks , kind of satan black and you can put under coat over it if you want . i don't . Rene

[BlueSS454]

I wouldn't use POR15 on a rusty frame rail, let alone a new fender.  If you want to treat it, scruff it, blow a coat of epoxy primer on it, and paint it.  It will last a very long time.