To scrape or not ?

[74 DART']

Im working on the inner fenders on my Dart. Im thinking of using bed liner coating on the outside of the inner fenders. I’m wondering if I should remove all the undercoating first ? I know the metal underneath should be in good shape but I’m wondering if the new coating will adhere properly to the old undercoat.

 

[WV64Signet]

I removed all the old undercoating before refinishing the inners.. Personal preference. I wanted to go back to body color wheel wells as they were originally. It's not a daily driver

View attachment 1715935444

 

[eekvonzipper]

Man, That's a hard call. I figure you usually scrape when your just gonna remove it all to shave the weight...
If it doesn't Stick everywhere you could just Spray it again every couple years?
I scraped some of mine just to see it all and then just went back in with a Chassis Paint for now,
Doesn't really see rain or snow.

 

[Biff]

Remove !

 

[harrisonm]

Remove it. There are two ways to do things. The easy way and the right way.

 

[70dart340]

Good, fast, or cheap. Pick 2.

 

[Oldmanmopar]

Bed liner? I know someone with a jeep that did that. Got in an accident and sheet metal repair was next to impossible. Think about it.

 

[74 DART']

Thanks for all the replies. My original thought was to remove it but wasn’t sure if I was overthinking it. I know the metal underneath should be in good shape since it has been covered for 40 plus years now by factory undercoat. It’s not going to be a show car but want to do it the right way while I can!