Protecting paint under bumper

[Pdxguy]

I’m switching the bumpers on my recently purchased 72 2002. The prior owner had painted the bumper black and I am replacing it with a standard chrome bumper. Question is how to best protect the paint where the metal bracket sets against the painted surface of the trunk of the car. 
I thought about putting a dab of grease between the two surfaces, but wasn’t sure if grease would be more harmful to the paint then possible abrasion from mating the two metal surfaces. 
Thoughts?

 

Thanks,

Dennis

 

[visionaut]

Not grease. Maybe fab a gasket?

[Rodolfo Lasparri]

I used some closed cell rubber 1/16” that I got on Amazon, worked great.

 

MAGZO Adhesive Foam Pad 1/8 Inch Thick X 4 Inch Long X 4 Inch Wide, High Density Foam Sheet Square Rubber Pad Anti-Slip (10 Pcs) https://a.co/d/ifzew2f

[Pdxguy]

4 minutes ago, Rodolfo Lasparri said:

 

MAGZO Adhesive Foam Pad 1/8 Inch Thick X 4 Inch Long X 4 Inch Wide, High Density Foam Sheet Square Rubber Pad Anti-Slip (10 Pcs) https://a.co/d/ifzew2f

 

32 minutes ago, visionaut said: Maybe fab a gasket?

Makes more sense than lubricant. 
 

thanks

[TobyB]

I have some cool squidgy rubber tape that I stole from work

https://www.amazon.com/Scotch-Electrical-Tape-Width-Length/dp/B005YSM03S?th=1

(ooo, it was expensive, now I owe them something)

that works wonderfully for things like this.

I bet you can find it for cheaper...

 

Otherwise, I've also used dum- dum for sealing things like this.  Less protective,

but still seals well, especially around things like trim holes where water can cause

corrosion, but there's not much pressure holding things together.

Also does wonders for rattles, and good for sealing the plastic into the inside of a door...

https://www.amazon.com/3M-08578-Black-Strip-Calk/dp/B000PEZ1L4/ref=sr_1_16?crid=1R89PADKRNU21&keywords=3m%2Bauto%2Bbody%2Bsealant&qid=1691948406&sprefix=3m%2Bauto%2Bbody%2Bsealant%2Caps%2C203&sr=8-16&th=1

Doesn't taste very good, tho.

 

t

 

[Son of Marty]

I'd go to a bicycle shop give them a buck and they will give you a flat innertube, cut it up and make your gasket. 

[tzei]

1. Buthyl sealant

2. Car undercarriage rust-proofing stuff