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Go Back   PeachParts Mercedes-Benz Forum > Do It Yourself Links & Resources > Bodywork - Repair, Paint, Tools, Tips & Tricks

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  #1  
Old 04-10-2008, 01:31 PM
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floorpan repair: what undercoat to use?

I will be doing a major repair to the floor pans of my W123. I will be welding in new metal. After i'm done with the project whats the best thing for me to paint it with underneath? I plan on using POR15 inside the car.
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Old 04-10-2008, 02:28 PM
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I did a floor pan repair in my wagon and used the POR-15 as well. I just made sure everything was clean, dry, rust-free, sealed with POR-15, top-coated with chassis black , and then heavy-duty rubberized undercoating spray. It's holding up fine.
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Old 04-10-2008, 03:56 PM
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I used POR15 on both sides, seam sealed it on the bottom with 2 coats to take care of any pin holes, and then sprayed 2 good coats of quality undercoating on it
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Old 04-10-2008, 08:21 PM
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Quote:
Originally Posted by bob_98sr5 View Post
I used POR15 on both sides, seam sealed it on the bottom with 2 coats to take care of any pin holes, and then sprayed 2 good coats of quality undercoating on it
what is an example of a 'quality undercoating'? i see lots of different ones on the shelves at murries and auto zone.
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Old 04-11-2008, 08:16 AM
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I like "Marhyde" (spelled something like that anyway). I get it at my local Ace hardware. It's essentially just tar in a spray can. Applies well and has good coverage. It's not a "plastic" product so you actually have a chance of removing it from unwanted places such as ; brake rotors, exterior body parts, floors and exposed skin.

It's still a nasty job. The temperature needs to be in the upper 70's to the 90's for the best coverage and penetration.
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Old 04-12-2008, 08:05 PM
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the idea of using truck bedliner in a can also came to mind. does anyone have any experience with bedliner as an undercoating?
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Old 04-12-2008, 08:52 PM
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If you can get them to spray it on...

Most of the bedliner guys (Rhino, Line X, etc) have local dealers who do the work. I know the guy in CT will speay anything and Rhino guys th Texas regularly speay oil field gear sop anything is possible..

but to get complete coverage you would have to have the car on a lift, which most of the shops do not have.

also you would have to mask all the piping, wiring, etc as it would become encapsulated if not protected. and what about heat exposure from the cat converter?

The roll on stuff sold at Auto Parts stores is just basic thick epoxy paint.

Same with the garage floor paint.
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Old 04-14-2008, 02:47 AM
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hmmm, i'l remember that for the one day that i do a ground up restoration of this car. if you could get it up on a lift, totally stripped down i couldnt imagine any tougher undercoating then rhino liner.
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Old 04-14-2008, 08:33 AM
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I'd say if you wanted to properly rhino line the underside of a car you would need it on a rotisserie
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  #10  
Old 04-14-2008, 09:02 AM
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Quote:
Originally Posted by Stoney View Post
The roll on stuff sold at Auto Parts stores is just basic thick epoxy paint.
I put this stuff on the floor of My 1971 VW bus It worked out ok, I was taken the cheep way out, and I should of used Rhino liner or Line X to get the jobe done right.
Kevin
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Old 04-14-2008, 09:41 AM
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Don't forget. Those drain holes are there for a purpose! If you block them you are creating a bigger problem!

Check this link!

The "Kiss of Death" for all old Mercedes!
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Old 04-14-2008, 11:42 AM
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Quote:
Originally Posted by Mike D View Post
Don't forget. Those drain holes are there for a purpose! If you block them you are creating a bigger problem!

Check this link!

The "Kiss of Death" for all old Mercedes!

were some of those holes plugged from the factory?
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Old 04-14-2008, 12:43 PM
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Quote:
Originally Posted by validius View Post
were some of those holes plugged from the factory?

Hmmm, let me think. Factory trained assemblers versus some shmoe making 10 bucks or so an hour, or worse, on commission, doing one of the nastiest jobs I could imagine?

I'd bet the holes were NOT plugged from the factory.
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Old 04-23-2008, 05:46 PM
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Ill be doing the same in my 81 300D. Keep the posts coming.
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  #15  
Old 04-24-2008, 12:00 PM
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I used a product that you would use to dip tools (or whatever you want for that matter) in to put a rubberized grip on them. . .it was in the paint section of home depot and the black color worked out excellent, just painted it on to the areas that needed a little bit more protection. .cost like $6, could easily do both rocker panels. . .
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