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 Post subject: Refurbishing M900 Cranks
PostPosted: Tue Mar 20, 2018 9:43 pm 
Dirt Disciple

Joined: Sun Nov 26, 2017 3:24 pm
Posts: 96
Hi All,

I need to tidy up a set of M900 cranks. They're not badly damaged, just scuffed from use in good old North Yorkshire grinding paste. The decals are long gone on the drive side and pretty pumped on the non-drive side.

Has anyone had much success with this? I guess I need to polish all the scuffs out, but are replacement decals available from anywhere, and what is the factory finish - lacquer or ano etc?

Cheers,

Neilios


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 Post subject: Re:
PostPosted: Tue Mar 20, 2018 9:46 pm 
retrobike rider
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Joined: Wed Apr 15, 2009 1:08 pm
Posts: 3698
Location: Woking
I think Gil might do replacement decals.

SP


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PostPosted: Tue Mar 20, 2018 9:50 pm 
Dirt Disciple

Joined: Sun Nov 26, 2017 3:24 pm
Posts: 96
Thanks SP, is that this guy? https://www.facebook.com/retrodecals/


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 Post subject: Re:
PostPosted: Tue Mar 20, 2018 10:29 pm 
Old School Grand Master
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Location: The Shire
That's the fella


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PostPosted: Wed Mar 21, 2018 1:48 pm 
BoTY Winner
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Joined: Tue Apr 04, 2006 6:39 pm
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Location: Durango CO, USA
It's a fairly intense process actually. Arms are clear anodized, so you'd need to remove that first. Then sand/buff out the pits or scuffs, then polish, then new decals, then polish again, and then re-anodize.


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 Post subject: Re:
PostPosted: Wed Mar 21, 2018 2:27 pm 
Retro Guru
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So you anodize after decals have been applied :?:


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 Post subject: Re: Re:
PostPosted: Wed Mar 21, 2018 4:25 pm 
BoTY Winner
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Location: Durango CO, USA
DY85262 wrote:
So you anodize after decals have been applied :?:



Let me clarify - OG M900 cranks don't have decals. They were either ink stamped or decal transfer. I'm not sure. And the final coat would be a clearcoat to give it that blueish grey finish.


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PostPosted: Wed Mar 21, 2018 5:06 pm 
Retro Guru
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Great, Helios I think a progress thread is in order. :D


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 Post subject: Re: Re:
PostPosted: Wed Mar 21, 2018 5:28 pm 
Retro Guru
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Location: Near Gatwick
ridevintagemtb wrote:
DY85262 wrote:
So you anodize after decals have been applied :?:



Let me clarify - OG M900 cranks don't have decals. They were either ink stamped or decal transfer. I'm not sure. And the final coat would be a clearcoat to give it that blueish grey finish.


Wouldn't they have printed after anodising and then seal them?


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PostPosted: Wed Mar 21, 2018 9:18 pm 
Dirt Disciple

Joined: Sun Nov 26, 2017 3:24 pm
Posts: 96
I actually think these cranks are lacquered. It doesn't look or feel like anodising to me - where it's scuffed, I can feel a step... They could of course be polished, anodised THEN lacquered.

I can't feel the decal, so they're very very thin.

Can't really afford NOS cranks, so these are going to have to be refurbed somehow.

Here's a couple of pics I took, I was trying to capture the thickness of the coating.

ImageP1030715

ImageP1030714

ImageP1030719


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