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Old 06-11-2012, 02:44 PM
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anti stone chip smooth primer on early fenders ,want nice finish

Hi


Early 30's steel fender undersides ,so are fairly visible, have already prepped / etch primed + high build 2k primer,want to finish smooth with same colour as topside but also dont want (many)stonechips


Thinking of using anti stonechip primer (eg Wurth or 3m ,the type which can be painted over)
Afaik this has a texture ,presume can sand smooth when dry (shrunk) ?
Is it supposed to be overcoated with colour / top coat in a "window of time" or should one use an adhesion promoter prior to colour coats ?

Or would some extra coats of 2k / single stage colour instead of anti stone chip help prevent stone chip damage...?

Thanks in advance for any advice.

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Old 06-12-2012, 04:52 AM
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Epoxy primer will reduce stone chips better than anything I've tried.
I use it on bumpers now and have seen a huge improvement against
road rash. Regular 2K primer isn't a very good choice for that.
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Old 06-12-2012, 06:52 AM
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I am running rear Fiberglass Fenders on my Coupe, and I too was worried about stars and such, so I sprayed all of them with SPI Bedliner-you can set the Spray Gun to lay it out smooth if you want-(just a thought)-
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Old 06-12-2012, 10:21 AM
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Stone chip in a rattle can lays down pretty smooth
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Old 06-12-2012, 10:30 AM
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Yep I have to say, epoxy primer over bare metal then your color is going to do a LOT more than chip guard you put over what you have.

I have to tell you, with the "Clear bra" material that is available, I am thinking this is the cats meow for what you are doing. I have thought about the very thing you are talking about in projects in the past and did something similar, chip guard. But with the clear bra (clear bras, don't you just love the idea ) invention it would be a very good solution, and MUCH better than some lumpy chip guard.

I have a pair of guys who come around to the shop who puts this stuff on everything and you can barely tell it's there unless you get up real close to see it. On the underside of the fender it would be virtually unseen.

If the fender was off it would be way easier for them I would think. But even with the fender on the car, pull the wheel get it up on stands and they could do it no problem, at least the guys I use.

Check out this site to see what I am talking about. Click here for clear bra installation photos.

Brian
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Old 06-12-2012, 05:00 PM
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It sounds like you are actually talking about "stone bruising" from underneath.... right?

I have used undercoating and bed liner with good success. If you ask your paint store, or read the labels, many are paintable.
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Old 06-13-2012, 01:55 AM
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Thanks for suggestions so far , some food for thought

Definitely won't be going on dirt / gravel roads ! The fender undersides ,particularly the front are quite visible so was hoping for a smooth
finish , most anti stone chip & bedliner seem to be "textured" afaik

Makes sense that the aerosol anti stonechips would be thinner ,therefore
smoother

would wonder how the 3m ventureshield would work on a concave / reverse
curve surface
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Old 06-13-2012, 05:39 AM
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The biggest problem with those clear bra's is you can never find the hook.
My wife just got one and she loves it, smooths everything right out and hides all the inperfections,she's wearing it right now,OMG, no she's not,and shes got that dam look in her eye again too..Gotta go,time to run. before she catches me..
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Old 06-13-2012, 08:12 AM
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Quote:
Originally Posted by carfan
would wonder how the 3m ventureshield would work on a concave / reverse
curve surface
It would work just fine. These guys put this stuff on places what would blow your mind. We are talking completely covering front bumpers carefully cut around grilles where it is going into the low spots like on spoilers and such. I would think this would work perfect.

Brian
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Old 06-13-2012, 08:13 AM
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Quote:
Originally Posted by deadbodyman
The biggest problem with those clear bra's is you can never find the hook.
My wife just got one and she loves it, smooths everything right out and hides all the inperfections,she's wearing it right now,OMG, no she's not,and shes got that dam look in her eye again too..Gotta go,time to run. before she catches me..
LOLOLOLOLOL
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Old 06-13-2012, 10:44 AM
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A few cars here in the UK use clear vinyl on the lower rear quarters,wheel arches etc for just this purpose....unfortunately it doesn't work as a long term solution,they get peppered with stone chips and when we remove them the paint underneath is almost as bad.
Be ok in areas that don't see much abuse but where the front tyres are kicking up crap off the roads the areas behind tend to suffer.
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Old 06-14-2012, 05:26 AM
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Do some research on SPI bedliner. It comes clear and can be tinted for the color you want, and thinned for the texture you want. Just not sure how smooth it will get. Give Barry a call.
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Old 06-14-2012, 06:53 AM
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The smooth painted underside of fenders says Show Car/Trailer Queen to me..use the bedliner in black as that is more practical and looks better I think..

Sam
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Old 06-16-2012, 10:31 AM
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Quote:
Originally Posted by OneMoreTime
The smooth painted underside of fenders says Show Car/Trailer Queen to me..use the bedliner in black as that is more practical and looks better I think..

Sam
Kind of my thoughts exactly.

Brian and DB, you're killing me.... Flash-backing to the 60's.
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