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-   -   Undercoating bottom of hood? (https://67-72chevytrucks.com/vboard/showthread.php?t=245027)

muddpile 06-11-2007 09:13 PM

Undercoating bottom of hood?
 
Can I use undercoating on the underside of my hood? I'd rather a black textured look than orange painted, and I figure this is the easiest/cheapest way to do it. Will it handle the heat and stick good, or am I better off with something else? I have cleaned/sanded it multiple times, so it is well prepped for something. Thanks!

Green Machine 06-11-2007 09:32 PM

Re: Undercoating bottom of hood?
 
Personally I wouldn't do it, but if you have to use something I guess I would try a spray can bed liner, give some texture and will resist most underhood fluids. If oil or gas got on the undercoat you would have a big sticky mess of tar all over. My 2 cents..........

eedgell 06-11-2007 10:06 PM

Re: Undercoating bottom of hood?
 
I have thought of doing this at some point, but I would take it to a rhino line, or some such place, dealer to be done by a professional. I thought it would help with the hood rattle. I have seen some of our hoods on 4x4's that run on rough roads all the time that have cracked as a result of flex. Maybe this would help?

muddpile 06-12-2007 12:47 AM

Re: Undercoating bottom of hood?
 
I wondered about the oil and gas issue too... If I recall, it deteriorates this product. Thanks for the tip.

CrashEd 06-12-2007 03:12 AM

Re: Undercoating bottom of hood?
 
LOL!! i bought one truck and the PO found that yard sticks were good to cut down on the rattle. Anyone need a yard stick i have lots of them.
Ed

Mudder 06-12-2007 06:55 AM

Re: Undercoating bottom of hood?
 
Would be hard to keep clean. The underside of my hood actually catches bugs. Mine is the same as the exterior. Those are my thoughts.

Richard H. 06-12-2007 07:58 AM

Re: Undercoating bottom of hood?
 
Mudpile , the bed on my dorf 250 has something like Rhino and I think it would be to heavy for the hood and springs , it's tough but it is like an 1/8 inch thick!
I have a remote spot welder and have been tossing around in my head to weld studs in to use insulation as a rattle dampner. Just a thought, RH

GMC Jim 06-12-2007 08:25 AM

Re: Undercoating bottom of hood?
 
I used a piece of commercial felt carpet pad ( 1/2 -5/8 thick)...This pad is quite dense compared to the felt pads I have seen some years ago used in home applications. Used construction cement ( Panel adhesive ) in a caulk gun... applied the caulk in 1/4" beads spaced about 6-12 inches apart. I also used about a number of plastic push- in attach clips in the hood rib areas... Got these from a junk yard, these are used in some car trunks and hood liners to hold the sound deadening material in place.

fun in dirt 06-12-2007 09:25 AM

Re: Undercoating bottom of hood?
 
Don't use the spray can bed liner. Used it on a firewall one time & it only last about5 months.

Yukon Jack 06-12-2007 09:44 AM

Re: Undercoating bottom of hood?
 
I'm a bit concerned also about the weight issue. My hood on my K5 vibrates a fair amount at idle and I would be worried about the effect of that extra weight.

JameslovesJammie 06-12-2007 10:37 AM

Re: Undercoating bottom of hood?
 
What about por-15? Wouldn't be as thick and heavy as rhino liner and won't deteriorate if chemicals get on it?

kawahawk 06-12-2007 11:13 AM

Re: Undercoating bottom of hood?
 
how about a high heat flat black like for a weber grill?

muddpile 06-12-2007 12:35 PM

Re: Undercoating bottom of hood?
 
Hi heat spray paint was another thought of mine. Sound deadening and heat aren't my major concerns, but rather appearance.

mrein3 06-12-2007 01:08 PM

Re: Undercoating bottom of hood?
 
I had a quart of black DuPont Centuri left over that I bought in 1986. Two years ago I used a 3M 'sandblaster' disk in my grinder to take the hood down to bare metal. I prepped that and sprayed it with PPG epoxy. Over the epoxy I sprayed the single stage black. Two years later it still looks good.

It is a dead bug magnetic howerver.

One more thing. I masked off the braces when I sprayed the black. Then masked the black off and sprayed the body color on the braces.

Aarons72s 06-12-2007 01:56 PM

Re: Undercoating bottom of hood?
 
The spray can bedliner, duplicolor, definetly needs to be painted or it will fade and peal in no time. Dont ask how I know. Id take it and have it sprayed by line-x, rhino, or whatever bed liner places you have. Just specify them to apply it thinly. I have seen some applied thick and others applied thin.

EAST SIDE LOW LIFE 06-12-2007 02:31 PM

Re: Undercoating bottom of hood?
 
1 Attachment(s)
I would be careful what I used on the underside of the hood (fire safe) is what you need to think about as well as durability and appearance. I like SEM products as they fit the above criteria. Also you will want something that you can freshen up easily if things start to look a little bit like this was done 5 years ago, if you know what I mean. SEM makes a textured paint product as do allot of other companies.

High heat paint is really not a big concern as the factory never used it and most paint will handle the heat generated in an engine compartment.

esll.:)


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