Powder Coating Colours

Technical advice Q&A

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JC
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#1 Powder Coating Colours

Post by JC » Sat Feb 27, 2021 5:19 pm

I intend to get my picture, bonnet and engine frames powder coated - my SII is primrose yellow. I popped along to my local sand blasting firm who only offer a very limited range of colours.

Before I cast my net wider, I wondered if anyone knows if there is a 'powder coating' colour that matches primrose yellow so that I can ask firms is they offer that colour. The local firm suggested there was not an infinite number of colours available, and I'm guessing I'm not the first person to encounter this challenge!!

Cheers, John C

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mgcjag
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#2 Re: Powder Coating Colours

Post by mgcjag » Sat Feb 27, 2021 7:26 pm

Hi John...iv never heard of anyone powder coating E type frames...one big problem will be all the fixing holes will be coated..you may then have to file the hole to remove the coating so you csn get the bolts in....then its exposed to the elements and some powder coat can start to peal off....keep it simple and have them paint sprayed body colour....Steve
Steve
69 S2 2+2 (just sold) ..Realm C type replica, 1960 xk150fhc

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christopher storey
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#3 Re: Powder Coating Colours

Post by christopher storey » Sun Feb 28, 2021 8:01 am

I agree with Steve ; you may also, believe it or not, alter the overall geometry of the front of the car with the thickness of the powder coating involved

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Robbiee
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#4 Re: Powder Coating Colours

Post by Robbiee » Sun Feb 28, 2021 10:03 am

Powder coating is great but I tend to restrict it to parts that are not exposed to road dirt/water
It’s great on certain things like heater boxes, air trumpets filter cylinder
Definitely NOT front frames.
The rear IRS frame is debatable but I’ve found powder coating ok so far
Robbie
Robbie 1962 3.8 Coupe OSG 1962 OTS ODG

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steve3.8
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#5 Re: Powder Coating Colours

Post by steve3.8 » Sun Feb 28, 2021 11:02 pm

christopher storey wrote:
Sun Feb 28, 2021 8:01 am
I agree with Steve ; you may also, believe it or not, alter the overall geometry of the front of the car with the thickness of the powder coating involved
Very true , but i don't think you would even get that far ---- the high build on the frames will probably stop them from entering the chassis rails .
Steve3.8

64 3.8 fhc, 67 4.2 fhc

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Fspp369
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#6 Re: Powder Coating Colours

Post by Fspp369 » Mon Mar 01, 2021 10:12 am

Powder coating anything that might get chipped is a bad idea because the moisture gets under and before long off it comes. There are powder coatings that have a zinc base to them but they are not terribly tough and so may only defer the “peel” ,they are also expensive and not that many people do them. My local guys do and I’ve used it for some out side kit but that’s not on a vehicle.
You may also consider the temps involved.. they should be ok, nothing is over 300 C but stress relief in larger panels would be a problem.
As for colours..all RAL couloirs are apparently available but you may have to pay for a whole box, and only use a1/4 ???
Stay with spray paint and a good undercoat and prime such as zinc182 IMHO.
Peter.
Peter {XKE V12HE efi}
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ysmalkie
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#7 Re: Powder Coating Colours

Post by ysmalkie » Mon Mar 01, 2021 8:16 pm

Good protection as a primer is electroplating - very think layer of paint, very durable.

It's the one use one used on metal wheels - look at the contact they have with salt and the paint holds for 5+years quite well..

The trick is, that this paint has to be covered with some paint on the top, otherwise the UV will kill it.

Google electropalting - really good solution, best for any suspension parts that were painted black.

Tadek
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Fspp369
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#8 Re: Powder Coating Colours

Post by Fspp369 » Tue Mar 02, 2021 8:48 am

With regard to paint and durability...I routinely used a good red metal oxide as a quite thick layer under a top coat of smooth black implement enamel on the rolling gear of a 101 forward control Land Rover in an off road club for many years, with great success. If the base metal prep is done well (grit blasting being the best) then this will give the optimal surface for fresh paint.
The paint I used was called “Dacrylate Metal oxide Primer” but using a specific thinner that was required, the Implement Enamel was also from the same Co.
I do appreciate that if you belong to the “Originality at all costs ownership” group then this is not a solution for you, so you will have to find a Cadmium Platers able to do the business!
If you are around cadmium then be careful because cadmium fumes from drilling, heating or any circumstance that generates the fume may be detrimental to health. Cadmium has a very low melting melting point and fumes enter the lungs and make their way to the liver and Kidneys where they store, and her lies the problem, levels build with continued exposure !!!!!! BE VERY CAREFUL.
Peter.
Peter {XKE V12HE efi}
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RR Phantom 3 1937 Sedanca de Ville.

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Series1 Stu
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#9 Re: Powder Coating Colours

Post by Series1 Stu » Tue Mar 02, 2021 11:31 am

I don't think the engine frames were ever cadmium plated - they would risk hydrogen embrittlement.

They will have been primed and painted as part of the body-in-white process.



Regards
Stuart

If you can't make it work, make it complicated!

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Fspp369
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#10 Re: Powder Coating Colours

Post by Fspp369 » Tue Mar 02, 2021 11:46 am

was a general comment.
Peter {XKE V12HE efi}
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RR Phantom 3 1937 Sedanca de Ville.

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#11 Re: Powder Coating Colours

Post by christopher storey » Tue Mar 02, 2021 12:50 pm

I don't think that ysmalkie was really intending to refer to electroplating : I suspect that the words he was looking for were electrophoretic painting

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#12 Re: Powder Coating Colours

Post by Series1 Stu » Tue Mar 02, 2021 2:50 pm

Yes, I think you are right. I have had some spectacular results with electrophoretic coating from a corrosion resistance point of view. It is very effective - we have left electrophoretic coated steel panels outdoors, open to the elements, for more than 12 months without any noticeable corrosion occurring.

It isn't always appropriate but it can give great results.

Regards
Stuart

If you can't make it work, make it complicated!

'62 FHC - Nearing completion
'69 Daimler 420 Sovereign
'78 Land Rover Series 3 109

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ysmalkie
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#13 Re: Powder Coating Colours

Post by ysmalkie » Tue Mar 02, 2021 3:16 pm

ysmalkie is Tadek and yes, definitely the electrophoretic painting is what I was referring to.

Apologies for all confusion!

Tadek
christopher storey wrote:
Tue Mar 02, 2021 12:50 pm
I don't think that ysmalkie was really intending to refer to electroplating : I suspect that the words he was looking for were electrophoretic painting
Tadek

e-type S1 3.8 FHC - in restoration phase...
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Austin-Healey 100 BN2

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politeperson
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#14 Re: Powder Coating Colours

Post by politeperson » Tue Mar 02, 2021 3:25 pm

Just paint them as normal.

Even powder coating chips if you hit it with a hammer or an engine.
Anyway, frames rust from the inside out, so you would be defending from the wrong direction.

After they are painted, let them cure for a week, with coat them with high pressure cavity wax and they will last forever.

Or they will last until someone crashes the car, which does seem to happen with E types.
Its true, but Enzo never said it
Too many E types
XK120 SUs

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ysmalkie
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#15 Re: Powder Coating Colours

Post by ysmalkie » Wed Mar 03, 2021 1:30 pm

Prior to painting think of using some rust stabilizer for the inside.
I use FERTAN.

Tadek
Tadek

e-type S1 3.8 FHC - in restoration phase...
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Austin-Healey 100 BN2

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JC
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#16 Re: Powder Coating Colours

Post by JC » Sat Mar 06, 2021 11:03 pm

Thank you all for your comments!! Much food for thought - luckily I've a few weeks 'thinking' grace as I'm still re-assembling 'stuff' onto the bulkhead before I re-attach the engine frames!!

Cheers, John C (1970 SII OTS)

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