The rubber trim in the wheel well of my sister’s car separated from the steel frame. What’s the best way to reattach it?
Obviously I’ll clean the steel and rubber with soap and water, and probably use some kind of adhesive. I know it needs to be weather proof and vibration proof. I was thinking construction adhesive, but I think that would fail the vibration test. Then I thought epoxy, but standard epoxy would probably have the same issue. What about steel reinforced epoxy?
Any other suggestions? Should I use an abbrasive like steel wool?

Look on the wheel well on the other side of the car and we how that piece of trim is attached to that wheel well.
Chances there’s a groove it has to get seated back into. Try to reseat the trim.
If the trim got damaged somehow and wont reseat, take it to a parts store and they will sell you a replacement.
Is this wheel well trim or is this rear door seal trim that’s hanging out? If its door seal, it has small plastics clips that clip into the door, you can buy them cheap on aliexpress, or expensive at the dealership
I’d probably cut it off.
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3M DP420, assuming you never -ever- want it to come off again.
I would have sworn you were trolling with “dp 420”
One would think, but you definitely want to keep “DP 420” and DP420 farrr away from each other.
Look for different types of automotive push clips, construction adhesive like loctite 3PL or similar.
See what the manufacturer uses and do that.

