por15 with or without undercoating - The 1947 - Present Chevrolet & GMC Truck Message Board Network

04 orange · 07-30-2013, 11:02 PM

Got all the rust repair on the floor done and got it por15. Should I put a undercoat on top of that or just run in with the por15 on it?? Thanks!

dfwright · 07-31-2013, 08:54 AM

I'm interested to see what opinions folks have. I've done the same thing, I have POR-15 on the bottom of my cab as well. The more I've thought about it, the more I think I'd like to go back and put on a coat of rubberized undercoating over the POR-15, even though I didn't prep the POR-15 for a top coat, which will make doing so difficult at this point on mine.

88fordf150 · 07-31-2013, 08:59 AM

Can you paint over it body color?

04 orange · 07-31-2013, 09:08 PM

ttt

sprint_9 · 07-31-2013, 09:57 PM

I plan on using either undercoat or bed liner on top of mine. The POR 15 will likely discolor over time. Ive read of it discoloring even if its not in direct sunlight.

Chrome8 · 07-31-2013, 10:53 PM

You could spray it with second skin sound deadener. Just a thought, they advertise it as an undercoat as well. That would help with keeping the cab quiet as well as undercoating the truck. I haven't used it but it looks like a fine idea looking at their website. http://store.secondskinaudio.com/spectrum/

bobs409 · 08-01-2013, 06:35 AM

You should be able to spray it with etch primer and then top coat with whatever you like.

From the factory these are red oxide primer from what I heard so that's an option if you want the factory look.

I personally wouldn't use undercoat. Most people want to get rid of that stuff on old cars/trucks rather than add it. How about just an etch prime and a coat of semi gloss black?

Your choice...

gotchamel · 08-01-2013, 08:22 AM

I just did my bed with Raptor made by upol.com,I was very impressed with it and how easy it applied.It is what I will be using for underside of cab.

04 orange · 08-01-2013, 07:59 PM

Yeah i cant decide if i just want to paint it or use 3m's rubberized undercoat. Color or if it fades doesnt mater to me im going to drive the hell out of it, i just want it protected as mush as possible.

FLDBRED · 08-01-2013, 08:26 PM

Por-15 has a paint called "Hard Nosed", it goes on after you use por-15. I used it in the bed of my truck and like it!

POR15 Hardnose Paint Testing - YouTube

07-30-2013, 11:02 PM	#1
04 orange Registered User Join Date: Sep 2006 Location: Midlothian, Tx Posts: 144	por15 with or without undercoating Got all the rust repair on the floor done and got it por15. Should I put a undercoat on top of that or just run in with the por15 on it?? Thanks! Attached Images

07-31-2013, 08:54 AM	#2
dfwright Registered User Join Date: Jan 2009 Location: San Antonio, Texas Posts: 1,374	Re: por15 with or without undercoating I'm interested to see what opinions folks have. I've done the same thing, I have POR-15 on the bottom of my cab as well. The more I've thought about it, the more I think I'd like to go back and put on a coat of rubberized undercoating over the POR-15, even though I didn't prep the POR-15 for a top coat, which will make doing so difficult at this point on mine. __________________ 1972 C10 LWB, 350/350 Deconstruction began 5/2009, mostly completed restoration, 5/2017

07-31-2013, 08:59 AM	#3
88fordf150 Registered User Join Date: Nov 2009 Location: Michigan Posts: 473	Re: por15 with or without undercoating Can you paint over it body color? __________________ Brad handshoe

07-31-2013, 09:08 PM	#4
04 orange Registered User Join Date: Sep 2006 Location: Midlothian, Tx Posts: 144	Re: por15 with or without undercoating ttt

07-31-2013, 09:57 PM	#5
sprint_9 Registered User Join Date: Nov 2012 Location: 9 Posts: 862	Re: por15 with or without undercoating I plan on using either undercoat or bed liner on top of mine. The POR 15 will likely discolor over time. Ive read of it discoloring even if its not in direct sunlight.

07-31-2013, 10:53 PM	#6
Chrome8 Registered User Join Date: Nov 2005 Location: Park Rapids, MN Posts: 288	Re: por15 with or without undercoating You could spray it with second skin sound deadener. Just a thought, they advertise it as an undercoat as well. That would help with keeping the cab quiet as well as undercoating the truck. I haven't used it but it looks like a fine idea looking at their website. http://store.secondskinaudio.com/spectrum/

08-01-2013, 06:35 AM	#7
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	Re: por15 with or without undercoating You should be able to spray it with etch primer and then top coat with whatever you like. From the factory these are red oxide primer from what I heard so that's an option if you want the factory look. I personally wouldn't use undercoat. Most people want to get rid of that stuff on old cars/trucks rather than add it. How about just an etch prime and a coat of semi gloss black? Your choice... __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10

08-01-2013, 08:22 AM	#8
gotchamel Registered User Join Date: Feb 2011 Location: islamorada fl. Posts: 466	Re: por15 with or without undercoating I just did my bed with Raptor made by upol.com,I was very impressed with it and how easy it applied.It is what I will be using for underside of cab.

08-01-2013, 07:59 PM	#9
04 orange Registered User Join Date: Sep 2006 Location: Midlothian, Tx Posts: 144	Re: por15 with or without undercoating Yeah i cant decide if i just want to paint it or use 3m's rubberized undercoat. Color or if it fades doesnt mater to me im going to drive the hell out of it, i just want it protected as mush as possible.



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