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  What's the best method to remove discoloration on newly painted valve covers.

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What's the best method to remove discoloration on newly painted valve covers. by Gokart
Started on: 05-31-2014 12:42 PM
Replies: 5 (143 views)
Last post by: Gokart on 05-31-2014 06:35 PM
Gokart
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Report this Post05-31-2014 12:42 PM Click Here to See the Profile for GokartSend a Private Message to GokartEdit/Delete MessageReply w/QuoteDirect Link to This Post
Fiero Jon had these painted for me a couple years ago when he replaced my engine and they're looking aged already. I'm assuming I'll have to sand the discoloration off?

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Report this Post05-31-2014 03:36 PM Click Here to See the Profile for IMSA GTClick Here to Email IMSA GTSend a Private Message to IMSA GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
You can sand that with a long board sander so you will not sand down into the actual colored portion. You will just ride on top of the groves. Unfortunately the aluminum would have to be clearcoated to keep that pitting from happening again. I would use VHT clearcoat engine enamel. It withstands heat to 550 degrees and should be compatible with your existing paint/powdercoat without bubbling it up.

[This message has been edited by IMSA GT (edited 05-31-2014).]

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AL87
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Report this Post05-31-2014 03:47 PM Click Here to See the Profile for AL87Click Here to Email AL87Send a Private Message to AL87Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by IMSA GT:

You can sand that with a long board sander so you will not sand down into the actual colored portion. You will just ride on top of the groves. Unfortunately the aluminum would have to be clearcoated to keep that pitting from happening again and I don't know of any high heat clearcoats.


most places that sell automotive paint like autozone, advance, etc, all have "high heat" engine paint. and in that section, they sell clearcoat!!!

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Report this Post05-31-2014 04:01 PM Click Here to See the Profile for IMSA GTClick Here to Email IMSA GTSend a Private Message to IMSA GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by AL87:


most places that sell automotive paint like autozone, advance, etc, all have "high heat" engine paint. and in that section, they sell clearcoat!!!


You are correct but to be safe, make sure the clear is an enamel based paint.....not lacquer or acetone based.
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Fiero84Freak
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Report this Post05-31-2014 06:34 PM Click Here to See the Profile for Fiero84FreakClick Here to Email Fiero84FreakSend a Private Message to Fiero84FreakEdit/Delete MessageReply w/QuoteDirect Link to This Post
That's what I did with mine - I used a fine grit sand block and just sanded the rough looking patches up. Also did that with the plenum. Then hit both with clear heat resistant enamel that most all the parts stores sell. I did them when I re-did my valve cover gaskets, and when I was swapping my '86 GT's flat top plenum for the later engraved style.

[This message has been edited by Fiero84Freak (edited 05-31-2014).]

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Gokart
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Report this Post05-31-2014 06:35 PM Click Here to See the Profile for GokartSend a Private Message to GokartEdit/Delete MessageReply w/QuoteDirect Link to This Post
Great advice! Thanks gents.
Marc
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