Will the paint stick? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

braggwood · 10-06-2006, 06:09 PM

I have a 72 chrome grille shell that has tarnished, I want to paint it the same color as the truck, is there anything I should do other than sand, to make paint stick. I also plan to do the same on chrome door handles and mirrors which are pitted and need sanded. ALL ONE COLOR!! Thanks

68GenIII · 10-06-2006, 06:12 PM

Quote:

Originally Posted by braggwood

I have a 72 chrome grille shell that has tarnished, I want to paint it the same color as the truck, is there anything I should do other than sand, to make paint stick. I also plan to do the same on chrome door handles and mirrors which are pitted and need sanded. ALL ONE COLOR!! Thanks

You could probably sand blast them to ruff em up?

cableguy0 · 10-06-2006, 06:35 PM

use a good etching primer so it bonds well to the grill shell.just painting it its most likely going to flake off. i would also sand it pretty good

CPNEJR · 10-06-2006, 07:06 PM

sand it with a course sand paper and use self etching primer so that it will adhere to it and then paint

72-stomper · 10-06-2006, 07:20 PM

Are you sure your grill is chrome and not aoidizied aluminum????? Better make sure....And I would use a 2k epoxy primer instead if the self etch...I am not sure if the "old school" etch primer can be sprayed on aluminun like epoxy.(ppg dplf).....I would LIGHTLY sand blast to roughen up the surface....
Lightly means just enough to dull up the surface....No more....Lightly....
Epoxy sticks to anything.......

**CMars45000** · 10-06-2006, 08:22 PM

An etch wash or primer is not really necessary since corrosion on aluminum is not a HUGE issue (Yes, bare aluminum will oxidize a little but not to the extent that bare steel will..) I would just sand blast it and then use a high build 2k primer and sand with P600 and then base and clear it... Epoxy primer will work well too just lay it down flat b/c it is nasty to sand ...

Aarons72s · 10-06-2006, 09:04 PM

Etch prime it. I worked for a company for a couple of days that painted aluminum box trucks for oil fields. They acid primed the shell then coated it with single stage nason paint. Looked nice and from what the guy told me that was how they do all the aluminum bodied vehicles. The acid prime is not for corrosian at least in this case it just gives the paint something really good to bond to thanks to the primer etches itself into the metal.
Aaron

bigbassmann · 10-07-2006, 11:42 PM

I sanded the grill shell on my '70 C10 with 100 grit sandpaper. I also did a little body work (knocking out dents, dings and bent areas) and used some body filler to smooth everything out. Primed and then painted with Nason bc/cc. Turned out real nice.

**PICKMUP** · 10-08-2006, 03:42 PM

All GMC grills are steel.
Sand blast it. That is the best way to get all of the surfaces and edges roughed up, including the back. It removes rust better than sanding, also.
Treat it like bare metal: etch or self-etch.

10-06-2006, 06:09 PM	#1
braggwood Registered User Join Date: Apr 2006 Location: Grandview WV Posts: 41	Will the paint stick? I have a 72 chrome grille shell that has tarnished, I want to paint it the same color as the truck, is there anything I should do other than sand, to make paint stick. I also plan to do the same on chrome door handles and mirrors which are pitted and need sanded. ALL ONE COLOR!! Thanks

10-06-2006, 06:35 PM	#3
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: Will the paint stick? use a good etching primer so it bonds well to the grill shell.just painting it its most likely going to flake off. i would also sand it pretty good __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-06-2006, 07:06 PM	#4
CPNEJR Registered User Join Date: Sep 2003 Location: Franconia,N.H. Posts: 1,029	Re: Will the paint stick? sand it with a course sand paper and use self etching primer so that it will adhere to it and then paint __________________ (Only) Member of the CPNE Fan Club Aint that the truth 67 C-10 350 with 3-speed tranny and 308 gears swb step 82 Z28 Camaro 355 small block over 350 hp and a borg warner super t-10 (blown engine) 72 Chevy K20 Suburban (future project) 70 Chevy K20 now 68 GMC K2500 2003 Chevy 2500hd ccsb 4X4 (daily driver)

10-06-2006, 07:20 PM	#5
72-stomper Registered User Join Date: Nov 2005 Location: wisconsin Posts: 142	Re: Will the paint stick? Are you sure your grill is chrome and not aoidizied aluminum????? Better make sure....And I would use a 2k epoxy primer instead if the self etch...I am not sure if the "old school" etch primer can be sprayed on aluminun like epoxy.(ppg dplf).....I would LIGHTLY sand blast to roughen up the surface.... Lightly means just enough to dull up the surface....No more....Lightly.... Epoxy sticks to anything.......

10-06-2006, 08:22 PM	#6
CMars45000 Registered User Join Date: Jul 2006 Location: Pittsburgh, PA Posts: 204	Re: Will the paint stick? An etch wash or primer is not really necessary since corrosion on aluminum is not a HUGE issue (Yes, bare aluminum will oxidize a little but not to the extent that bare steel will..) I would just sand blast it and then use a high build 2k primer and sand with P600 and then base and clear it... Epoxy primer will work well too just lay it down flat b/c it is nasty to sand ... __________________ Project Family Values Build Thread Vehicles/Projects: -1971 C10 SWB Fleetside! Gathering parts now, will begin frame-off resto soon... Pleasure in the job puts perfection in the work. -Aristotle

10-06-2006, 09:04 PM	#7
Aarons72s Registered User Join Date: Apr 2006 Location: oklahoma Posts: 10,669	Re: Will the paint stick? Etch prime it. I worked for a company for a couple of days that painted aluminum box trucks for oil fields. They acid primed the shell then coated it with single stage nason paint. Looked nice and from what the guy told me that was how they do all the aluminum bodied vehicles. The acid prime is not for corrosian at least in this case it just gives the paint something really good to bond to thanks to the primer etches itself into the metal. Aaron

10-07-2006, 11:42 PM	#8
bigbassmann Registered User Join Date: Oct 2006 Location: McComb, MS Posts: 20	Re: Will the paint stick? I sanded the grill shell on my '70 C10 with 100 grit sandpaper. I also did a little body work (knocking out dents, dings and bent areas) and used some body filler to smooth everything out. Primed and then painted with Nason bc/cc. Turned out real nice.

10-08-2006, 03:42 PM	#9
PICKMUP "Trucks with Class" Join Date: Jul 2000 Location: OLYMPIA, WA, USA Posts: 8,158	Re: Will the paint stick? All GMC grills are steel. Sand blast it. That is the best way to get all of the surfaces and edges roughed up, including the back. It removes rust better than sanding, also. Treat it like bare metal: etch or self-etch.



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