Charles R Simmers
Joined: 19 Apr 2000
Posts: 117
Location: Arizona, USA
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 Posted: Thu Jul 15, 2021 9:11 pm Post subject: Paint finish |
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I am about to start doing some rust repair to my '67 T. Mostly exterior rust panels from Flying Spares.
My question pertains to the finish of the panels. My original sills, valences, and lower body panels below the chrome strip have, what looks like, a lightly "hammered" finish. The new replacements are smooth. Is this finish in some kind of undercoating or primer, or is it actually in the metal itself? Is this factory or an aftermarket application to visually minimise stone chipping? |
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AskerBrowne
Joined: 14 Mar 2002
Posts: 125
Location: Isle of Wight, United Kingdom
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| Posted: Fri Jul 16, 2021 7:16 am Post subject: |
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| Sounds like an orange peel appearance from an inferior paint respray. |
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Charles R Simmers
Joined: 19 Apr 2000
Posts: 117
Location: Arizona, USA
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| Posted: Sat Jul 17, 2021 7:22 pm Post subject: |
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Perhaps I should be more specific. This is much larger feature than orange peel.
If I were to attempt to replicate this, I would use a ball peen hammer with a hardwood buck, randomly banging lightly every half inch, or so.
I have never seen a finishing technique like this before. |
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John Murch
Joined: 05 Jun 1976
Posts: 1567
Location: London, United Kingdom
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| Posted: Sun Jul 18, 2021 4:45 am Post subject: |
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I imagine the effect you describe is an anti stone chip coating, I recall it on quite a few cars in the past, but cannot recall if it was used on Bentley T’s.
https://www.mig-welding.co.uk/stonechip.htm |
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Charles R Simmers
Joined: 19 Apr 2000
Posts: 117
Location: Arizona, USA
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| Posted: Sun Jul 18, 2021 7:17 pm Post subject: |
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| That looks like the stuff. Thanks, John. |
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Stephen Blakey
Joined: 02 Feb 1995
Posts: 1337
Location: Derbyshire, United Kingdom
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| Posted: Wed Jul 21, 2021 9:34 pm Post subject: |
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| John Murch wrote: | I imagine the effect you describe is an anti stone chip coating, I recall it on quite a few cars in the past, but cannot recall if it was used on Bentley T’s.
https://www.mig-welding.co.uk/stonechip.htm |
Great link, John. It's lovely to hear from someone with actual experience of what he's talking about. I kind of knew that people specify grit blasting in preparation for epoxy primer but for some reason hadn't connected that with poor adhesion.
By coincidence, I have started using a surface tolerant epoxy;
https://www.jotun.com/uk/en/b2b/paintsandcoatings/products/Jotamastic-90.aspx
I had 3 gallons mixed in BS4800 Juniper green. So far I'm just using it on general steelwork around the place; shelving, barn doors and the like, which it is not practical to grit blast. Early indications are good and if it stays stuck on, I will give it a go on the cars.
I also wasn't aware you can get a smooth finish on stone chip, so the forum has proved educational again.
I will send the link to my pal who has just bought an ex-South Africa MK2 Jag and is going to respray it. He will need to do a thorough job to prevent it defaulting to doing what MK2 jags did when exposed to the British climate. |
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