Undercoating wheel wells and frame.

[Jason85GMC]

Didn't like the look of my wheel wells and frame, so I've decided to do some undercarriage work.

My plan was to start with the wheel wells, using a wire brush attachment and a drill to remove the rust and grime down to the bare metal. After that, some cleaning, and light sanding, I was thinking about using a 3M undercoating spray.

Researching this however it appears 3M makes alot of different options.

So the question really is:

Rubberized or non-rubberized? (3m makes both)

Does either need to have a primer put down first?

Anyone else have experience with doing this, that can offer advice?

Thanks
Jason

 

[k20]

Ive undercoated my wheel wells, I used the 3m rubberized kind, pretty good stuff. I also did my firewall, cant remember the brand off hand but it was supposed to have some sound deadening properties. I did the firewall cause when I painted the truck didnt want to go to the trouble of completely stripping the firewall and all the factory seam sealer to paint it so I undercoated it to cover the factory color.

I just sprayed over any paint or old undercoating that was already there so I dont think you need a primer for it.

 

[Jason85GMC]

Did you use primer first?

 

[k20]

nope, like said just sprayed over the paint/old undercoating that was there. Havent had any problems out of it, and some of it has been done for......6yrs now.

 

[blueblazes44]

Had undercoating on mine but after a couple of months the GA. clay turned it gray. Pressure washed it OFF and now use only gloss blk spray-the .88 wallyworld brand. 10 min. once a month and frame and wheelwells look better than new.

 

[hammermachine]

Rubber coat

I used Blue Magic Rubbercoat it goes on with alot of spray pressure and it really feels like rubber. So far I've used it for my tailpan and rear of the truck (after I used a rust converter). I will use it for the rest of the try before the winter starts. Good stuff.

 

[Cornfield creations]

I use the 3m non-rubberized. In my experience the rubberized turns brown eventually. The non stays black or fades slightly. Another option I have seen, one of my buddies used the cheap dupicolor bedliner in his wheelwells. Turned rock hard and looked good. I wouldn't use the bedliner on the frame though. Too hard to remove if needed.

 

[COCHEV]

what about just using hurculiner as undercoating?