[Roadsters] Chrome processing--was Bumper

[Daryl Smith]

I had my bumpers done about 12 years ago. I now have some rust starting to 
form on the back side of the bumpers.
Do you coat the back side of the bumpers with POR 15 or similar when you 
first get them back from the platers?

Daryl


> tputland at charter.net writes:
>
>>From  Keith:              "Your parts will end up  paper thin. "
>
> So.....
>
> I am a little unclear on this point. I  under stand that the grinding will
> thin the metal. But doesn't the chroming  process add (layers of metals) 
> to the
> part, making it thicker (and  heavier)?
>
> Is the thinning from grinding still an issue even with new  metal being
> added?
>
> (read the last line on my signature if you are un  clear as to my mental
> abilities!) ;-)
>
> Tim
> Belleville, WI.
> '70 SPL  AND SRL
> Still clueless but always learning
>
>
>
> They are removing steel, a structural material, and adding copper, nickel
> and chrome, a cosmetic coating. The amount of steel removed to get to the 
> bottom
> of the pits is a lot thicker than the amount of copper, nickel, and chrome
> you  want to pay for. Good question though, in some applications, like
> hydraulic  cylinder rods, they will build them up with chrome and grind 
> them down to
> size.
>
> keith