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Author Topic: Engine paint changed color after heat curing  (Read 1690 times)

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Offline mrosso

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Engine paint changed color after heat curing
« on: March 17, 2009, 01:25:35 PM »
I just painted my CB750K crank case halves. I cured both in my gas BBQ and they came out a different color than they went in. The color is a sort of gold tint. I'll work on getting some pictures up. Anyone else have this happen before?
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Offline psykod

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Re: Engine paint changed color after heat curing
« Reply #1 on: March 17, 2009, 01:30:24 PM »
My engine slowly turned gold after using Duplicolor engine clearcoat (not the high temp stuff).  Some areas of the head turned almost brown.
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Offline heffay

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Re: Engine paint changed color after heat curing
« Reply #2 on: March 17, 2009, 01:40:36 PM »
mrosso... what paint?

psykod... i'd have to recommend nothing but hi temp products... i think you may have figured that one out already though.   ;)
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Offline OldSchool_IsCool

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Re: Engine paint changed color after heat curing
« Reply #3 on: March 17, 2009, 02:11:02 PM »
Which BBQ sauce did you use?   I've seen this happen with Open Pit, but never with Sweet Baby Ray's ;D
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Offline WFO

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Re: Engine paint changed color after heat curing
« Reply #4 on: March 17, 2009, 02:25:30 PM »
Quote from: mrosso on March 17, 2009, 01:25:35 PM
I just painted my CB750K crank case halves. I cured both in my gas BBQ and they came out a different color than they went in. The color is a sort of gold tint. I'll work on getting some pictures up. Anyone else have this happen before?


Did you use cherry wood or applewood?  ;D i would have used the oven in the house for more consistancy the grill is going to have all kinds of stuff burning off unless it is brand new.
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Offline greenjeans

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Re: Engine paint changed color after heat curing
« Reply #5 on: March 17, 2009, 02:34:26 PM »
my 2 cents.....  it's residual smoke that's in there from the grill or briquets etc.

Does it taste or smell like BBQ ?
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Offline CBJoe

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Re: Engine paint changed color after heat curing
« Reply #6 on: March 17, 2009, 03:01:47 PM »
Quote from: greenjeans on March 17, 2009, 02:34:26 PM

Does it taste or smell like BBQ ?

For the love of Bob, please post pictures of this  ;D 

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Offline mrosso

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Re: Engine paint changed color after heat curing
« Reply #7 on: March 17, 2009, 04:00:43 PM »
Nope, no bbq sauce. I used Duplicolor Hi-Temp Engine Paint. I'll post a pic when I can.
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Offline BobbyR

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Re: Engine paint changed color after heat curing
« Reply #8 on: March 17, 2009, 04:16:22 PM »
Did u burn off the grease from the grill first?????? or do u have last weeks steak mixed with your paint.
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Offline mrosso

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Re: Engine paint changed color after heat curing
« Reply #9 on: March 17, 2009, 04:36:52 PM »
Gas grill, cleaned first, each case half was cured in two different batches hours apart. Color is uniform and the same on both halves.
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Offline heffay

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Re: Engine paint changed color after heat curing
« Reply #10 on: March 17, 2009, 05:44:56 PM »
i think what might have happened is you actually "baked" it... instead of slowly cured it w/ heat.

see what i mean?

the flame inside the grill as opposed to simple heat might have been part of it too.
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Offline mrosso

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Re: Engine paint changed color after heat curing
« Reply #11 on: March 17, 2009, 06:04:18 PM »
How bad is baking versus curing? I'd hate to go through the whole stripping, prepping, masking, painting, curing crap again. Next time, I'm waiting till my girlfriend leaves the house and in the f***ing oven it goes!
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Offline cafe750

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Re: Engine paint changed color after heat curing
« Reply #12 on: March 17, 2009, 07:47:32 PM »
If you do throw it in the oven in your kitchen, make sure you've got all the windows open, with fans everywhere, otherwise it'll wreak of paint for days....don't ask me how I know.... ;)

When I painted my engine, I simply ran it, and the engine heat was enough to cure it...
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Offline russouno

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Re: Engine paint changed color after heat curing
« Reply #13 on: March 18, 2009, 12:57:53 PM »
Yep, exact same thing happened to my engine after using the "Hi Temp Ceramic clearcoat".....
Before & after pics....It sort of leaves it looking 'anodized gold'... I would of liked it to stay the color it was when I sprayed it on..
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Offline heffay

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Re: Engine paint changed color after heat curing
« Reply #14 on: March 18, 2009, 01:24:40 PM »
russ... the latter looks more honda
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Offline mrosso

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Re: Engine paint changed color after heat curing
« Reply #15 on: March 18, 2009, 05:11:45 PM »
That's it. Mine looks just like that. I'm going to attack it tonight with a can of Aircraft stripper and start over. Crap!
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Offline heffay

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Re: Engine paint changed color after heat curing
« Reply #16 on: March 18, 2009, 05:18:14 PM »
WAIT!  WHY?

the last picture posted looks awesome to me!

damn picky muther f'ers... i'm a picky mofo too and i don't know what you're going on about.
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Today: '73 cb350f, '96 Ducati 900 Supersport
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