Re: Holley Carb. plating
I use Caswells Iron phosphate for hot dip parts, and a product called "ospho" for quick spray on raw steel to prevent surface rust.
Yes, just dilute the nitric to 1% or less. Use distilled/RO/deioniized water.
The nitric dip only takes a few seconds. You will clearly SEE the change, and when it stops changing, pull it out.
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