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Old 04-25-2009, 07:15 PM   #1 (permalink)
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Undercoating or Paint underneath body?

I am getting ready to pull the body off the frame on my convertible. Any thoughts on undercoating the underside of the body versus painting? The undercoating is a spray on type material that looks like the Rhino truck bed liner material.
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Old 04-25-2009, 07:39 PM   #2 (permalink)
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Re: Undercoating or Paint underneath body?

I sprayed the entire underside of my car with equipment enamel. It is thick and durable. I may go back and spray some undercoating over certain areas as a sound deadener.
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Old 04-25-2009, 07:43 PM   #3 (permalink)
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Re: Undercoating or Paint underneath body?

I believe the undercoating protects for a longer time on a driver but there are some good tough paints out there now and the smooth paint looks a lot better on a show type car. Bottom line, I guess its what do you have planned to do with the car and which do you like the best.

Scott...
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Old 04-25-2009, 10:06 PM   #4 (permalink)
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Re: Undercoating or Paint underneath body?

Bravo Tudor!

I say do what you think would have the best effect visually... Your car's are gorgeous, why not make the dirty parts gorgeous too!

Undercoating falls off, Bedliner would be excellent, Paint is durable AND pretty...
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Old 04-27-2009, 04:16 PM   #5 (permalink)
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Re: Undercoating or Paint underneath body?

Magnet Paints Manufacturers High Performance Specialty Coatings

This is a good alternative to Por-15 type paint. To me, it is like putting a coat of plastic on whatever is painted by it. It is perfect for the type of thing you want to do ie...under body protectant. Best to spray it on if you can, I have tried a few times to paint parts with it, but i get flaws and air bubbles no matter what I do with a brush or roller. It is thick, so I would imagine if thinned out a bit would spray nice.
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Old 04-27-2009, 06:25 PM   #6 (permalink)
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Re: Undercoating or Paint underneath body?

i'm in the process of trying this under the 63. hope to have it sprayed before the end of may. just primed the undernieth last weekend, so bottom is ready, but need to tie up a few loose ends.

United States - Products and Info

Raptor bed liner by u-pol

the local paint shop has been selling it with good results so far, talked to a individual who sprayed there truck bed 2yrs ago with it and no complaints. compared to what Rhino liner costs this is a fraction and i figured it would hide the flaws i made
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Old 04-27-2009, 06:45 PM   #7 (permalink)
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Re: Undercoating or Paint underneath body?

It just occurred to me that you said this is a convertible. When did you get a convertible? Do you have pics?
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Old 04-27-2009, 07:56 PM   #8 (permalink)
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Re: Undercoating or Paint underneath body?

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It just occurred to me that you said this is a convertible. When did you get a convertible? Do you have pics?

Sold the 62 Mercury wagon and 60 Sunliner convertible and picked up a 62 Mercury Convertible. I am in the process of installing parts I had lined up for 60 Convert, pulled off the Starliner, and some from the 62 wagon. I will post some pics in the next month when I have it running.
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Old 04-28-2009, 07:52 AM   #9 (permalink)
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Re: Undercoating or Paint underneath body?

What ever happened to the 61 wagon you were building? I was very interested in following that build to see where it went.

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Old 04-28-2009, 08:28 AM   #10 (permalink)
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Re: Undercoating or Paint underneath body?

I went with spray on bed liner under the entire convertible body and even inside the vehicle. All the floors pans and trunk are sprayed. Car is super quiet and water will never, ever, ever penetrate this stuff to start te rusting process again. Atleast spray the floors and trunk with this stuff. I agree that for a true show car, this would not be the best for the underneath of the body. However, if you are going to drive the car it will get rock chips underneath. Just my opinion, which you obviously dont need considering your car building/designing genius.
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Old 04-28-2009, 06:46 PM   #11 (permalink)
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Re: Undercoating or Paint underneath body?

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What ever happened to the 61 wagon you were building? I was very interested in following that build to see where it went.

Scott...

Still working on it. It's going slow. I should have the roof done fairly soon and then will need to stop until I can afford to paint it.
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Old 04-28-2009, 08:23 PM   #12 (permalink)
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Re: Undercoating or Paint underneath body?

Do you have any updated photos of the work or the roof part on your site?

Scott...
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Old 04-28-2009, 09:09 PM   #13 (permalink)
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Re: Undercoating or Paint underneath body?

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Do you have any updated photos of the work or the roof part on your site?

Scott...
not yet. I will post them here and on my site but it may be a month or so.
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Old 07-18-2009, 04:17 AM   #14 (permalink)
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Smile Re: Undercoating or Paint underneath body?

I used qwikliner spray on bedliner on my jeep interior and exterior.Qwikliner spray on bedliner has a lifetime warranty against chipping,peeling and cracking.
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Old 07-18-2009, 08:26 AM   #15 (permalink)
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Re: Undercoating or Paint underneath body?

after the rot encounered on our 65, I'm not a fan of undercoating at all...the stuff gets loose and rusts behind, and till it falls off, no idea...paint is nice- looks good, easy to rinse off, and any rust under will bubble up so you can at least know of a problem before its gone- but bedliner i would *think* would be by far the best/most permanent solution- only worry would be prep needs to be proper or it could get the old undercoat type rust under it...I'd be tempted to put bedliner on a year or two after painting, just to be sure the base is rust free- gotta scotchbrite a bit for the liner to biite anyway. Some of the bedliner products harden as smooth as paint so again, easy to rinse off unlike the rough/cratered look of many undercoats.

when I got my 06 mustang, tore it apart while it had still never been wet/dirty and injected paint into all the vertical pinch welds(rocker bottoms etc) to seal the tiny gaps between spotwelds- when it started oozing thru, just taped over the bottom seam to hold it in...
sealed all but the lowermost drains off, and on the front frame horns (for lact of a better term) up behind the headlights, made little reverse 'scoops' to divert road spray from being able to blow into the frame- yet still alllow breathing and a exit point for flushing out.
scuffed the painted areas like wheelwell lips/gaps between front lower a-arm plates and used rollon bedliner over them to seal and prevent stone chips from starting rust. mines got almost 30k on it, over 3 yrs old, still like new underneath...my wifes 07has 10k on it, and looks considerably worse underneath- the front a-arms have rust lines around the welds/seams, some little rust showing here and there...we got hers slightly used, so couldnt treat it like mine for fear of sealing dirt/moisture inside...anyway, the week I spent under mine now makes me feel it was well worth the effort...the 09 still hasnt been on the road, so its probably gonna get the same treatment eventually before driving it, but for now its staying a 3 mile virgin

Our 65 I used POR15, and overcoated with their light blue 'tie coat primer' that must be used before topcoating- after getting it done, liked how 'bright' it looks when working under, so left it without topcoat...just painted the trunk floor/rocker areas enough it appears black unless you are underneath it. So far the paint is holding up excellent, but there are some areas where I used too thick a coat of seam sealer and as it shrunk the paint got cracks...other than that it could pass for 6 months old not almost 6 years

Tim
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