Quote:
Originally Posted by HD Rider
What he said.
They quit doing this because paint started peeling and clogging the pickup screen. I have not seen it done in the last 20 years.
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FYI, 'they' didn't quit doing this. It is still done by some of the top race engine builders in the country. Many other high-performance rebuilders do this also. Unless my customer tells me not to, I paint all the engines we do with Glyptol also. I stand behind my applications.
As Chris stated above, the coating is totally reliant on the cleaning process. Jet washing does not provide a clean base for a coating. Since many Model-A engine rebuilders do not have enough budget to do a thorough cleaning of the castings, then under those circumstances they should not use any coatings. For those that use a multistep process including thermal and soaking prior to jet washing and shot-blasting, then coatings provide a few added benefits and longevity.