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What the heck did the machine shop put on my head?
#1417075 Thu Jul 15 2021 04:54 PM
Joined: Jun 2021
Posts: 17
F
'Bolter
After getting my 1957 235 head back from the machine shop I sprayed on Eastman paint prep to get the, what I thought was an, oil film off before painting. The more I sprayed and brushed the more metal colored stuff kept coming off. After spaying two cans of the acetone I'm getting close to it being clean. I'm very new to this, my first head from a machine shop, so I'm wondering if this is some kind of clear coat or cast iron colored paint on it. I'm now hoping I didn't screw this up.
Anyone know what's this is about, or words of wisdom?
thanks,
Paul

Re: What the heck did the machine shop put on my head?
FarmerPaul #1417080 Thu Jul 15 2021 05:27 PM
Joined: Apr 2005
Posts: 10,213
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
I would have called the machine shop before I started removing any coating.


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne 4dr 230 I-6 one owner (I’m #2) “Emily”
‘39 Dodge Businessmans Coupe “Clarence”



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Re: What the heck did the machine shop put on my head?
FarmerPaul #1417116 Thu Jul 15 2021 09:42 PM
Joined: Jun 2021
Posts: 17
F
'Bolter
Unfortunately I didn't know there was any coating on it except oil film before I hosed it down with acetone.

Re: What the heck did the machine shop put on my head?
FarmerPaul #1417217 Fri Jul 16 2021 08:12 PM
Joined: Jul 2008
Posts: 1,423
H
'Bolter
Best advice is to call them and ask secret what they used. There is no way we could guess ohwell what another person does.
Harold


Harold
Is a restoration ever finished?
Re: What the heck did the machine shop put on my head?
FarmerPaul #1417219 Fri Jul 16 2021 09:04 PM
Joined: Feb 2016
Posts: 547
7
'Bolter
I would say they painted it with cast iron gray enamel, as long as you have it stripped and the remaining is not lifting from the iron you should be fine just hitting it again with the engine paint of your choice.


1957 Chevrolet 5700 LCF 283 SM420 single speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto
Re: What the heck did the machine shop put on my head?
FarmerPaul #1417227 Sat Jul 17 2021 12:56 AM
Joined: Feb 2004
Posts: 23,246
H
'Bolter
Lots of machine shops use this stuff:

https://goodson.com/products/lb-1-cast-iron-spray-paint

It's a quick drying flat finish paint that looks like cast iron and keeps reconditioned heads, blocks, and such from rusting in storage. You can paint over it with any good quality high temp engine enamel.
jerry


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