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Paint Shop Tech. Talk about paint removers, thinners, primers and application techniques plus related topics. Rust removal, paint substitutes and color matching.

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Do we need Primer on Bare Cast Iron?

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Old 07-04-2019, 01:46:33 PM
Mark20h Mark20h is offline
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Default Re: Do we need Primer on Bare Cast Iron?

I have ben debating weather to use urethane or epoxy primer on a hit and miss engine. The urethane is a high build and both have to be sanded before painting. How do you sand all the areas on a engine. or is there a different type of primer that doesn't require sanding?
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Old 07-05-2019, 08:05:27 AM
cobbadog cobbadog is offline
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Default Re: Do we need Primer on Bare Cast Iron?

G'Day Mark,
Read post #6 in this thread and this may help you decide. Also keep reading the following replies as you will discover when it comes to painting you will get out what you put in. Little effort can equal a poor result. Select a paint product range where you can buy a primer and top coat of the same brand as these are designed to work together. Your cast iron usually has a rough surface so it is impossible to rub it back properly after a high fill primer has been applied but you should at least try. I sprayed an etch primer directly onto the cast iron and alloy parts and then top coat directly onto that but with the tinware I have applied a primer filler and will have to wet rub them back for a best result.
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