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Primer paint vs rust preventative oil coating

I have a fabricated structure, which is machined, drilled and tapped and assembled. I would like to know what would be the preferred surface protection for the top face of tapped holes which is connected to other assembly by bolting.
1. Give a rust preventative oil coating on machined face. OR
2. Give a coating of primer paint

Jayaprakash Nickam
Product designer - Bangalore, India
March 8, 2010

Hi, Jayaprakash. Well, primer is for priming, which means that's the wrong answer for a final finish. So, by process of elimination, rust preventative oil :-)

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
March 8, 2010

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