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Re: Part Help???
Do you still have your originals? Because my 1970 C10 still had the original thresholds and they appeared (initially) to be hopelessly rusted. And you cannot use electrolysis to remove rust on anything chromed - (due to hexavalent chromium toxicity and not to mention illegal and dangerous to dump the solution), so that option was out..
But I obtained a three foot section of ABS plumbing pipe from Home Depot and glued a 3" abs pipe cap on one end to form a deep narrow container; and filled the pipe with molasses (I think it was three 12 ounce jars) and a little water.. I put both of the rusty thresholds in there and stored it with a bungie cord holding it upright- and you can't be in a hurry because they sat for about a month while I was doing other things - but when I took them out they easily brushed clean down to good metal and I was able to prime and paint with urethane catalyzed paint and reuse those original thresholds - 45 years old....
Downside is they don't necessarily look stock because they are painted instead of chromed - but at least they are original and they could always be re-chromed in the future.
It would have been tough to clean them up by hand or with any kind of wire wheel or abrasive method; although probably a sandblaster would have a similar result..
Hope that helps and sorry no photos
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