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Old 09-25-2011, 11:48 AM   #1
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2012 JKU Rubicon Undercoating/Sidesteps

Sorry, this may bother some hardcore Jeep fans. I have to make my new toy into a mall crawler/daily driver for my wife until we get it paid off. Then I get to drive it and modify it to my specs. We live in the country and get snowed in for a couple of weeks per year, so we've always had 4x4's. I need this expensive toy to last, so I found some areas under the fender wells that I undercoated before I put on MOPAR side steps. I still need to fabricate some pieces of kydex to further protect some of the chassis from rocks. Or, Heaven Forbid, I may consider adding MUD FLAPS..... But, really WTF???? It seems that the factory could have made the fenderwell covers actually cover all of the obvious painted areas of the chassis that are in the CONSTANT line of fire from tire rockrash. It would have only taken another 2 or 3 percent of coverage to do it right. Am I asking too much from manufacturer???
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Old 09-25-2011, 06:03 PM   #2
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Looks great. Just don't think people are overly concerned about exposed paint in those areas. Assume that during production, why waste time and mask off areas not going to be seen?

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Old 09-25-2011, 07:06 PM   #3
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Exclamation What did you use to under-coat

Just picked up my 2012 Wrangler Unlimited and have noticed un-painted ares on the under-carrage also

What did you use to cover these areas?
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Old 09-25-2011, 10:02 PM   #4
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Quote:
Originally Posted by kjeeper10 View Post
Looks great. Just don't think people are overly concerned about exposed paint in those areas. Assume that during production, why waste time and mask off areas not going to be seen?
Thanks for the reply and you have a good point. However, I'm not at all concerned that the under chassis is painted. In fact that is a good thing, the more the better for rust protection. The entire under chassis is already painted. What I'm concerned about is that those areas of painted chassis (in the fender well area not protected by the plastic factory fender well) that will soon be blasted clean by tire thrown gravel, exposing the raw sheet metal. Within no time rust will begin eating it's way into the passenger compartment. Some of those areas that I coated are just one layer of thin sheetmetal from the interior and are in constant line of fire from the tire spall/schrapnel. This is why I think it is imperative to 1. Spray them with a "Rhino Coating" type of rubberized/polyurethane undercoating, 2. Extend the synthetic plastic fender well cover to provide lifetime armor protecting these areas. The auto industry had a great idea when they began lining the fender wells with plastic, they just didn't quite do a complete job in our case, which just baffles the crap out of me.
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Old 09-25-2011, 10:07 PM   #5
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Quote:
Originally Posted by willee51 View Post
Just picked up my 2012 Wrangler Unlimited and have noticed un-painted ares on the under-carrage also

What did you use to cover these areas?
I'll look tomorrow when I get back to my shop. I'm sure that just about any auto parts store has several good products in a spray can that are a thick rubber-like undercoating. Even the thick undercoating that I applied would not stand up very long to the constant bombardment of road gravel. Hence, the importance of extending the plastic fender well just a bit.
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Old 09-25-2011, 10:55 PM   #6
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Quote:
Originally Posted by BattleRifle

Thanks for the reply and you have a good point. However, I'm not at all concerned that the under chassis is painted. In fact that is a good thing, the more the better for rust protection. The entire under chassis is already painted. What I'm concerned about is that those areas of painted chassis (in the fender well area not protected by the plastic factory fender well) that will soon be blasted clean by tire thrown gravel, exposing the raw sheet metal. Within no time rust will begin eating it's way into the passenger compartment. Some of those areas that I coated are just one layer of thin sheetmetal from the interior and are in constant line of fire from the tire spall/schrapnel. This is why I think it is imperative to 1. Spray them with a "Rhino Coating" type of rubberized/polyurethane undercoating, 2. Extend the synthetic plastic fender well cover to provide lifetime armor protecting these areas. The auto industry had a great idea when they began lining the fender wells with plastic, they just didn't quite do a complete job in our case, which just baffles the crap out of me.
Huh never noticed. Either the pre 12 is different or my jeep is black, so I never noticed. I'll look 2mrw

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