| Powder Coating Bumpers [message #221158] |
Wed, 04 September 2013 17:41  |
bwevers
Messages: 597
Registered: October 2010
Location: San Jose
Karma: 5
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Has anyone refinished their bumpers with powder coat instead of chrome?
And how did they turn out?
I'm thinking of painting the bumpers to match the coach color.
Thanks,
Bill
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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| Re: Powder Coating Bumpers [message #221163 is a reply to message #221162] |
Wed, 04 September 2013 18:05  |
Harry
Messages: 1888
Registered: October 2007
Location: Victoria, BC CANADA
Karma: 3
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Wet paint and powder paint both come in graduated gloss levels.
Both technologies have base/clear technologies. Some powders dictate a base /clear to arrive at a desired gloss level whereas wet paint may not.
I haven't seen much of a difference in appearance attributes, if everything is equal. (gloss, DOI, orange peel, etc.)
Powder paint tends to be more forgiving when it comes to deviating from the ideal application parameters. Runs, hits, and errors are minimized with powder.
One advantage I've seen with powder paint is you can prime, base, and clear in one operation , then bake the material. In some cases it's infinitely faster to process than wet material.
Some powder paint technologies do not require a priming operation which in all cases is more time/cost effective.
Powder paint is more durable than wet paint by a wide margin. (chip resistance, chemical resistance, mar resistance, and wear resistance)
Powder paint technologies also offer better moisture resistance which in some climates can lead to fungus with most wet paint technologies.
You do have some limitations with powder paints such as colour selection, bake temperatures, etc.
Both technologies require the same pretreatment processes. I suggest you have the bumpers sandblasted before you paint them provided they are steel.
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| Re: Powder Coating Bumpers [message #221166 is a reply to message #221158] |
Wed, 04 September 2013 18:10 |
bwevers
Messages: 597
Registered: October 2010
Location: San Jose
Karma: 5
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I like the idea of chip resistance with powder coat.
I'll definitely sand blast...
Thanks,
Bill
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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| Re: [GMCnet] Powder Coating Bumpers [message #221167 is a reply to message #221166] |
Wed, 04 September 2013 18:40 |
Jeff Marten
Messages: 199
Registered: August 2013
Karma: 1
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Either sand/soda blast or:
1. soak in muriatic acid (50% HCl) to remove the chrome (a shallow poly/plastic storage bin works well)
2. attach a battery charger to the bumper (+) and a scrap piece of steel (-) clamped to the side of the poly tank to remove the nickel and copper layers (assuming they plated a base of copper on the steel bumper for leveling and improved adhesion, sometimes it's just chrome over nickel) Should work OK with the muriatic, just make sure it's a well ventilated area - H2 outgassing from the process is flammabe (very). Should only take a few amps; a variable power supply works better as you have more control of the current.
> To: gmclist@temp.gmcnet.org
> From: gmc1975@att.net
> Date: Wed, 4 Sep 2013 18:10:31 -0500
> Subject: Re: [GMCnet] Powder Coating Bumpers
>
>
>
> I like the idea of chip resistance with powder coat.
> I'll definitely sand blast...
>
> Thanks,
> Bill
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1985 Gulf Stream 34' Sun Stream
1964 Falcon 'Vert
1980 Bradley GTE
1999 Chevy Tahoe
2005 Saab 93 Aero
1987 Suzuki Intruder 1400
1978 Glastron/Carlson CV23
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| Re: Powder Coating Bumpers [message #221170 is a reply to message #221158] |
Wed, 04 September 2013 19:10 |
Kirk
Messages: 80
Registered: April 2008
Karma: 0
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Bill, fellow 49er Dave Case has powder coated bumpers. Give him a call.
Kirk & Eloise Yeager -
Motorcyclists/RVers/Dog Lovers -
77 Royale 455/TBI/3:55 -
49ers - N. Nevada -
NdnKirk at Gmail dot com
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| Re: [GMCnet] Powder Coating Bumpers [message #221173 is a reply to message #221158] |
Wed, 04 September 2013 20:41 |
John Olson
Messages: 96
Registered: August 2013
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I have zero expertise in the below process or materials.
Another option may be to polish the bumper, then coat with Por-15 clear.
I saw this Silversides in person and never questioned that the bumper
wasn't chromed recently and magnificently.
http://i363.photobucket.com/albums/oo78/Dreamscape_Eagle/Mark%20Renner%20Silverside/Silverside_69_zps24fa8422.jpg
Turns out, the owner had the bumper polished at a pro shop, then it was
candy-coated with Por-15 clear. Supposedly will resist road dings and last
beyond a chrome job. Again, I have no expertise in this, just relaying
another option to consider.
John Olson
76 Edgemonte
Chicago, IL
On Wed, Sep 4, 2013 at 5:41 PM, Bill Wevers <gmc1975@att.net> wrote:
>
>
> Has anyone refinished their bumpers with powder coat instead of chrome?
>
> And how did they turn out?
> I'm thinking of painting the bumpers to match the coach color.
>
>
> Thanks,
> Bill
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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John Olson
76 Edgemonte
Fulltime traveler
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| Re: [GMCnet] Powder Coating Bumpers [message #221192 is a reply to message #221190] |
Thu, 05 September 2013 08:32 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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I plan on painting mine.
I never understood why people would like powdercoat. It's no better than a good 2 part urethane and is not repairable. If you scratch it you have to strip it and recoat it.
Paint you can touch up easily.
I CAN see why manufacturers like it, as it's cleaner.
Although there are just as many ways to screw up powdercoating as there are to screw up paint.
I do both in my garage...
Also you can do paint at home if you have a cheap air compressor...
I love the chrome look, but not the rusty chrome look.
Steve, your bumpers look great.
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: Powder Coating Bumpers [message #221229 is a reply to message #221158] |
Thu, 05 September 2013 13:16 |
bwevers
Messages: 597
Registered: October 2010
Location: San Jose
Karma: 5
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Senior Member |
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I agree, Steve's bumpers look great.
It looks like there's more options than I realized.
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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| Re: Powder Coating Bumpers [message #221241 is a reply to message #221158] |
Thu, 05 September 2013 15:43 |
Francois
Messages: 161
Registered: October 2012
Location: Southern California
Karma: 0
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I have a similar project ahead. My bumpers are pretty rusty. I have already tried a drill motor with a wire brush on it. It barely worked. That rust must be thick.
I am going to want the chrome look when I'm done though, so I am glad to see there are a few options on that.
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