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Dealing with powder coat

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A100man
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Joined: 19 Aug 2013
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PostPosted: 19:44 - 25 Feb 2021    Post subject: Dealing with powder coat Reply with quote
Rubbing back the scabby subframe that hold the rear lights and grab rail on my FZ and it looks and feels plasticky as I imagine powdercoat would..

How do you deal with this if you only want to rub back the scabby bits spot prime and overcoats with some satin black? Does it all have to come off Confused ?

Cheers
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MarJay
But it's British!



Joined: 15 Sep 2003
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PostPosted: 19:52 - 25 Feb 2021    Post subject: Re: Dealing with powder coat Reply with quote
A100man wrote:
Rubbing back the scabby subframe that hold the rear lights and grab rail on my FZ and it looks and feels plasticky as I imagine powdercoat would..

How do you deal with this if you only want to rub back the scabby bits spot prime and overcoats with some satin black? Does it all have to come off Confused ?

Cheers

If you want it done properly you should blast it clean, and then re-apply the powder coat. Otherwise it'll end up flaking off even further and look awful.
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A100man
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Joined: 19 Aug 2013
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PostPosted: 20:02 - 25 Feb 2021    Post subject: Reply with quote
Hmm, I shan't be doing that I don't think

If it all has to come off I will repaint. I've heard how it can trap moisture under and corrosion can 'creep'..

What's bets to get it off? Just coarse grit paper since I don't have blaster handy?

Ta
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WD Forte
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Joined: 17 Jun 2010
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PostPosted: 20:24 - 25 Feb 2021    Post subject: Reply with quote
A100man wrote:

If it all has to come off I will repaint. I've heard how it can trap moisture under and corrosion can 'creep'..


Yep, that's the thing with PC
OK it's tougher and thicker than paint but as you can see, underlying corrosion can go unnoticed and creep and lift it in time.
I've pulled it off by the handfull from steel and alloy on old bikes
and not a fan.
Touching up can be tricky if you dont want to remove it all by blasting
I've removed it initially with a 80 grit sanding discs in the angel grinder
where accessible and a sharp 1/2" chisel, files and scrapers in nooks and crannies.
I treated the rot, primed and painted it but didn't get concourse standard results so no cunning wheezes I'm afraid as making bikes look pretty isnt my forte.
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droog
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Joined: 03 Dec 2019
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PostPosted: 08:55 - 26 Feb 2021    Post subject: Reply with quote
In addition to the 80 grit (mentioned above) I found that these cheap wire brushes attached to my old old Black & Decker drill were good for removing old powder coat from a frame/wheels etc - the wheel brush is particularly good for getting into the nooks and crannies.

https://tinyurl.com/4kwze768
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A100man
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Joined: 19 Aug 2013
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PostPosted: 10:15 - 26 Feb 2021    Post subject: Reply with quote
WD Forte wrote:


Yep, that's the thing with PC OK it's tougher and thicker than paint but as you can see, underlying corrosion can go unnoticed and creep and lift it in time.
I've pulled it off by the handfull from steel and alloy on old bikes
and not a fan.

I treated the rot, primed and painted it but didn't get concourse standard results so no cunning wheezes I'm afraid as making bikes look pretty isnt my forte.


Agreed1 . Can't help thinking it's a 'cheat' solution that doesn't always pay off - just look at all those council sign posts that have rotted in the ground. In the old days they would have been galvanised .

Agreed2. If I can achieve 'presentable' I'm happy. The FZ's worth a grand probably so time/effort needs to be justified. This frame is mostly hidden and most of it is sound. Getting it all one colour and waterproofed will be good enough I hope.
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Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600
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A100man
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Joined: 19 Aug 2013
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PostPosted: 10:16 - 26 Feb 2021    Post subject: Reply with quote
Droog wrote:
In addition to the 80 grit (mentioned above) I found that these cheap wire brushes attached to my old old Black & Decker drill were good for removing old powder coat from a frame/wheels etc - the wheel brush is particularly good for getting into the nooks and crannies.

https://tinyurl.com/4kwze768


Thumbs Up I'm often in Toolstation.
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Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600
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droog
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Joined: 03 Dec 2019
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PostPosted: 11:43 - 26 Feb 2021    Post subject: Reply with quote
A100man wrote:
Thumbs Up I'm often in Toolstation.


Yeah, me too - either that or Screwfix Smile
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WD Forte
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Joined: 17 Jun 2010
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PostPosted: 14:44 - 26 Feb 2021    Post subject: Reply with quote
I got these types for my angel grinder and they're feckin brutal
but dont half shift muckrustnshit off a frame

FFS WEAR GLUBS n GOGGLES!
a leather apron could help too
Any powered brush will shed bristles and these are no exception


https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Ftse4.mm.bing.net%2Fth%3Fid%3DOIP.L_t3c-soGwjjbxNJwWpEQwHaHa%26pid%3DApi&f=1
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