Black coating for barrel ?

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Re: Black coating for barrel ?

Postby asterysk_usa » Thu Nov 14, 2019 3:45 am

Was wondering about the finish of the back coating , should it be matt, semi gloss or full gloss ?

I have had a look at photographs online and see all 3 options .
1954 AJS 18S Cyprus export (frame decode says 1954 but many components match a 1955).

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Re: Black coating for barrel ?

Postby Dixter » Thu Nov 14, 2019 4:56 am

Gloss black powder coat. Almost indestructible, appearance doesn’t change if oily, and easy to clean.

Ciao, DC
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Re: Black coating for barrel ?

Postby asterysk_usa » Thu Nov 14, 2019 6:30 am

Dixter wrote:Gloss black powder coat. Almost indestructible, appearance doesn’t change if oily, and easy to clean.

Ciao, DC


Does it need to be special powder for the powder coat or just ordinary gloss black ? thx
1954 AJS 18S Cyprus export (frame decode says 1954 but many components match a 1955).

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Re: Black coating for barrel ?

Postby alanengineer » Thu Nov 14, 2019 12:02 pm

your local motorbike shop will sell an aerosol can of hi temp black paint developed for cylinders. Its easy to apply bakes on hard, have a selection between gloss and matt. Just degrease the barrel/shot blast it and spray. Job done.
Paint cost about £10 last time i bought some, enough for 2 barrels.

I have been put off powder coating of barrels because it might reduce the cooling effect of the fins(so im told) and i dont like powder coating anyway. And its another process you cant do at home.

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Re: Black coating for barrel ?

Postby dave16mct » Thu Nov 14, 2019 12:31 pm

I always spray them with Hammerite Smooth. Seems to stand the heat ok and always looks good. Also you can use the can to spray other small parts so its cost effective.
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Re: Black coating for barrel ?

Postby Mick D » Thu Nov 14, 2019 4:55 pm

asterysk_usa wrote:Was wondering about the finish of the back coating , should it be matt, semi gloss or full gloss ?


Hi

For best heat dissipation matt black, (looks the best too in my opinion).

Gloss powder coat is the worst of your proposals for heat dissipation and if it chips or peels it's not fixable at home and in situ.

Regards Mick

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Re: Black coating for barrel ?

Postby asterysk_usa » Fri Nov 15, 2019 4:29 am

Thankyou for all the advice, it helped me realise that for me heat transfer is paramount. The bike will be used in a hot country and it's already had a piston seizure. I am now on the hunt for a satin black spray on paint that can withstand high temperatures and has good thermal conductivity/radiation and can be applied in a thin layer.
1954 AJS 18S Cyprus export (frame decode says 1954 but many components match a 1955).

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Re: Black coating for barrel ?

Postby Duncan » Fri Nov 15, 2019 6:01 pm

There's always:
Granville Cylinder Black.jpg
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Re: Black coating for barrel ?

Postby SPRIDDLER » Fri Nov 15, 2019 6:17 pm

Deleted. Posted in wrong thread.
:oops:
Last edited by SPRIDDLER on Fri Nov 15, 2019 6:43 pm, edited 1 time in total.
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Re: Black coating for barrel ?

Postby Mick D » Fri Nov 15, 2019 6:31 pm

Hi

A little outside of the box but these type products are also worth consideration:

https://www.amazon.co.uk/Stovax-Black-W ... 503&sr=8-3

Regards Mick

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