[Roadsters] Chrome processing--was Bumper

[Daryl Smith]

Thanks for all the responses regarding painting the inside of a rechromed 
bumper.
Mine were painted silver when I got them from the chroming shop. Guess I'll 
just have to have them done again. POR 15 sounds like a good idea, But 
rustoleum may work just as well for a car that rarely gets wet.....

Daryl Smith


----- Original Message ----- 
From: "peter harrison" <granvillecomputing at hotmail.com>
To: "Daryl Smith" <drlsmith at dccnet.com>; <keith0alan at aol.com>; 
<tputland at charter.net>; <datsun-roadsters at autox.team.net>
Sent: Saturday, March 29, 2008 11:24 AM
Subject: RE: [Roadsters] Chrome processing--was Bumper




i always paint the inside with two coats of an appropriate colored 
rustoleum - seems to work fine.
----------------------------------------
> From: drlsmith at dccnet.com
> To: Keith0alan at aol.com; tputland at charter.net; 
> datsun-roadsters at autox.team.net
> Date: Sat, 29 Mar 2008 09:20:35 -0700
> Subject: Re: [Roadsters] Chrome processing--was  Bumper
>
> 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