Best way to preserve frame S/N

Feb, 1942 - GPW1 thru end of first contract, April, 1942 - GPW15000 NO EBAY or COMMERCIAL SALES.
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ascanio
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Best way to preserve frame S/N

Post by ascanio » Tue Aug 13, 2019 12:58 am

Hello

What do you think is the best method to preserve the faint serial number in the frame?

After having scratched it out and pictured, probably the best way to preserve it would be to repaint but this makes it unreadable, so any new scratch off would make it more and more not visible.

As I left not it gets already attacked by rust.

I was thinking to use a derust chemical and then cover it with a big deal of grease and replace periodically.

Is there any better way like transparent paint which would not be required to scratch off to reveal the S/N details in future?

Thanks for the suggestions!

Chuck Lutz
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Re: Best way to preserve frame S/N

Post by Chuck Lutz » Mon Aug 19, 2019 11:11 am

If you have faint stampings on the frame, you can try this trick:

1) before blasting the frame, cover the frame number with duct tape.
2) after blasting, when it is time to prime the frame, replace that tape with another fresh one and put on the one or two coats of primer you want on the frame.
3) after priming, remove the tape and LIGHTLY prime the bare metal area where the stamping is
4) when dry, cover the stamping again with tape and put on the two coats of OD on the frame
5) when dry, remove the tape and LIGHTLY paint the area with only ONE coat of OD

The trick is, on the one hand, to get excellent coverage with both the primer and the OD on everything else to protect the rest of the frame while at the same time, not flood a light stamping with so much primer/paint as to make it impossible to read.

6) be sure to take several EXCELLENT, Hi-Res photos of the frame stamping for your records!
Chuck Lutz

GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947

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W. Winget
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Re: Best way to preserve frame S/N

Post by W. Winget » Mon Aug 19, 2019 3:32 pm

alternatively, if you are absolutely certain of the numbers, you could apply a mastic, scrape out the numbers, apply a light etching acid to deepen the numbers, then neutralize the acid, prep, paint, etc.
Your not modifying the number, just improving the depth of stamping, nothing illegal about that then.
V/R W Winget
Looking for 1918 Standard B 'Liberty' truck parts

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