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Question about decklid vent painting by Kitskaboodle
Started on: 03-12-2019 11:35 PM
Replies: 13 (503 views)
Last post by: Spadesluck on 03-16-2019 03:07 AM
Kitskaboodle
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Report this Post03-12-2019 11:35 PM Click Here to See the Profile for KitskaboodleSend a Private Message to KitskaboodleEdit/Delete MessageReply w/QuoteDirect Link to This Post
It’s been about 6-7 years since I painted my deck lid vents. Over the last year or so I noticed the paint was actually peeling off in spots. I touched it up here and there but it’s starting to look kinda rough.
Anyways, this time around I would like to use paint that will last a little longer this time and not peel/flake off. And yes, I already know that it’s because of heat and the pot metal/aluminum composition of the vents that make the paint not stick well. That being said, what combination of paint and/or primer did you use to stop the paint from peeling/flaking off?
Thanks, Kit

[This message has been edited by Kitskaboodle (edited 03-12-2019).]

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olejoedad
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Report this Post03-12-2019 11:40 PM Click Here to See the Profile for olejoedadSend a Private Message to olejoedadEdit/Delete MessageReply w/QuoteDirect Link to This Post
Glass bead blast old finish off.
Duplicolor green self etching primer.
Duplicolor satin black.
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Kitskaboodle
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Report this Post03-13-2019 12:23 AM Click Here to See the Profile for KitskaboodleSend a Private Message to KitskaboodleEdit/Delete MessageReply w/QuoteDirect Link to This Post
Self-etching? I am familiar with zinc type primers but have never heard of self-etching. Please explain.
Kit
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da.slyboy
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Report this Post03-13-2019 01:25 AM Click Here to See the Profile for da.slyboySend a Private Message to da.slyboyEdit/Delete MessageReply w/QuoteDirect Link to This Post
I had mine blasted and powder coated....seems to be holding up well
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J Gunsett
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Report this Post03-13-2019 07:13 AM Click Here to See the Profile for J GunsettClick Here to visit J Gunsett's HomePageSend a Private Message to J GunsettEdit/Delete MessageReply w/QuoteDirect Link to This Post
Self Etching Primer is designed to prepare bare metal, aluminum and fiberglass surfaces to promote maximum adhesion and smoothness of the topcoat finish.

Jack
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fierofool
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Report this Post03-13-2019 07:56 AM Click Here to See the Profile for fierofoolClick Here to visit fierofool's HomePageSend a Private Message to fierofoolEdit/Delete MessageReply w/QuoteDirect Link to This Post
I've always used Zinc Chromate primer on aluminum parts. After it's thoroughly cleaned, degreased, and washed with white vinegar and dried. I think it's along the same line as what olejoedad suggested. I learned about it while helping rebuild an aircraft wing. I'm told that's what's used on aircraft to prevent paint peel.

After letting the automotive parts sun dry for at least 24 hours, I've sprayed with a high temp engine paint and let that sun dry for 24 hours, too. Then bake in a 250 degree oven for about 30 minutes. I suppose you could also oven cure your primer once it's air dried, but I just never went that route.

Another method of refinishing is to have them powder coated.
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Kitskaboodle
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Report this Post03-13-2019 09:47 AM Click Here to See the Profile for KitskaboodleSend a Private Message to KitskaboodleEdit/Delete MessageReply w/QuoteDirect Link to This Post
Ok, got it. Thank you for all the replies.
I too am very familiar with zinc chromate as my dad had been an aircraft mechanic for over 40 years and he always had a can of GREEN zinc chromate primer laying around in the garage.
Kit

[This message has been edited by Kitskaboodle (edited 03-13-2019).]

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Kitskaboodle
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Report this Post03-13-2019 09:49 AM Click Here to See the Profile for KitskaboodleSend a Private Message to KitskaboodleEdit/Delete MessageReply w/QuoteDirect Link to This Post

Kitskaboodle

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Ok, got it. Thank you for all the replies.
I too am very familiar with zinc chromate as my dad had been an aircraft mechanic for over 40 years and he always had a can of GREEN zinc chromatic prinet laying around in the garage.
Kit
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Tony Kania
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Report this Post03-13-2019 10:16 AM Click Here to See the Profile for Tony KaniaSend a Private Message to Tony KaniaEdit/Delete MessageReply w/QuoteDirect Link to This Post

This has actually been a very informative thread for me. I have learned a thing or two. Thanks all!
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pmbrunelle
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Report this Post03-13-2019 11:24 AM Click Here to See the Profile for pmbrunelleSend a Private Message to pmbrunelleEdit/Delete MessageReply w/QuoteDirect Link to This Post
I sandblasted and cleared my vents.

No idea how long it will last (car doesn't run yet) in service, but it does give a subtle look that sets it apart from other Fieros.
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2.5
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Report this Post03-13-2019 02:49 PM Click Here to See the Profile for 2.5Send a Private Message to 2.5Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Kitskaboodle:

Self-etching? I am familiar with zinc type primers but have never heard of self-etching. Please explain.
Kit


Etching to me in laymans terms means biting into the surface, sticking very well to it.
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pmbrunelle
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Report this Post03-13-2019 08:48 PM Click Here to See the Profile for pmbrunelleSend a Private Message to pmbrunelleEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by 2.5:


Etching to me in laymans terms means biting into the surface, sticking very well to it.


In terms of primer, self-etching means that the primer contains an acid that etches the surface of the metal, to create a rougher surface that the primer can mechanically bite into.
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unboundmo
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Report this Post03-15-2019 06:01 PM Click Here to See the Profile for unboundmoSend a Private Message to unboundmoEdit/Delete MessageReply w/QuoteDirect Link to This Post
I completely sanded mine down.. I used a self priming high heat BBQ paint (satin black 500-2100 degree spray) for the bottom side - topside as a primer.. I then used a gloss rustoleum (220 degree paint) for the top side only... originally was spraycan but the second time around when I did my added decklid vent, I spray it HVLP style... I've had no peeling what so ever or imperfections in the paint because of the heat.. it's held up great
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Spadesluck
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Report this Post03-16-2019 03:07 AM Click Here to See the Profile for SpadesluckSend a Private Message to SpadesluckEdit/Delete MessageReply w/QuoteDirect Link to This Post
I just had mine powder coated instead of trying to paint. Turned out well.
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