Restoration and recalibrate Avon scales

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Mike J
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Restoration and recalibrate Avon scales

Post by Mike J » Mon Aug 12 2019 22:47

New project; a pair of 40lb scales, left hanging in a bankside tree since February by a poacher.
Rusty, bent needle, lense scratched and cloudy, all screws and nuts seized, springs operating, reading 8oz light.

Anybody completed such a restoration, or re-polished the plastic lense?

So far I have;
Removed the hook and handle
Separated the two parts of the body
Removed the plastic sheet on the back
Removed the metal sheet supporting the lense
Removed the plastic lense
Freed off both balance spring screws and zeroing wheel

Nothing inside is worn, a few parts slightly bent so a distinct possibility of continued service if they can be restored, recalibrated and the lense cleared.
Last edited by Mike J on Tue Aug 13 2019 07:32, edited 1 time in total.

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Re: Restoration and recalibrate Avon scales

Post by Fastliner » Mon Aug 12 2019 23:03

This product is very good for removing the cloudy appearance on the plastic dial lenses,

https://www.halfords.com/motoring/car-c ... s-plast-rx

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Re: Restoration and recalibrate Avon scales

Post by Mike J » Tue Aug 13 2019 07:31

Fastliner wrote:
This product is very good for removing the cloudy appearance on the plastic dial lenses,

https://www.halfords.com/motoring/car-c ... s-plast-rx

Thanks for the advice. :thumbs:
I actually use Meguiars products on my car and find them superb.

Lense cleaning cont'd;
Just using products I have around the house and cotton buds.
First Hob Bright - it removed the ingrained dirt cut but not surface misting.
Next Jewellers Silver Polish on half the lense - even after five mins the clarity had improved enough to read the numbers.
My final test will be T Cut - on a very small side area incase its to abrasive.

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Re: Restoration and recalibrate Avon scales

Post by Kev Berry » Tue Aug 13 2019 07:42

Mike J wrote:
Fastliner wrote:
This product is very good for removing the cloudy appearance on the plastic dial lenses,

https://www.halfords.com/motoring/car-c ... s-plast-rx

Thanks for the advice. :thumbs:
I actually use Meguiars products on my car and find them superb.

Lense cleaning cont'd;
Just using products I have around the house and cotton buds.
First Hob Bright - it removed the ingrained dirt cut but not surface misting.
Next Jewellers Silver Polish on half the lense - even after five mins the clarity had improved enough to read the numbers.
My final test will be T Cut - on a very small side area incase its to abrasive.
Try toothpaste mike

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Re: Restoration and recalibrate Avon scales

Post by Slug » Tue Aug 13 2019 07:58

You can have them serviced and calibrated. Had an old set of reubons that came back like new and received exceptional costumer service. I think with the Avon’s you can’t get the lens and case replaced though just the internals.
Car headlight polishes work. I’d get some of that. T-cut has a lot of fillers so the effect might not last long.
Wd-40 works temporarily untill it washes off.

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Re: Restoration and recalibrate Avon scales

Post by Mike J » Tue Aug 13 2019 08:10

Thanks Kev, I will give toothpaste a try.
Slug, Im just trying to see what I can achieve without spending lots of money (Del and I have lots in common).

The internal metal case is galvanised but still has lots of surface corrosion, anyone with advice on how to prep it for painting?

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Re: Restoration and recalibrate Avon scales

Post by davelumb » Tue Aug 13 2019 08:25

Mike, I am disappointed to see you misspell 'lens'. :giggle:

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Re: Restoration and recalibrate Avon scales

Post by Mike J » Tue Aug 13 2019 08:34

davelumb wrote:
Mike, I am disappointed to see you misspell 'lens'. :giggle:

You know Dave when I tyoed it I knew it was incorrect but to tired and lazy to chack it!

:grin:

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Re: Restoration and recalibrate Avon scales

Post by davelumb » Tue Aug 13 2019 08:51

Mike J wrote:
davelumb wrote:
Mike, I am disappointed to see you misspell 'lens'. :giggle:

You know Dave when I tyoed it I knew it was incorrect but to tired and lazy to chack it!

:grin:
I'll let you off. :smile: It just drives me nuts on a photography forum, where you'd imagine everyone would know how to spell it! :roll:

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Re: Restoration and recalibrate Avon scales

Post by Matty » Tue Aug 13 2019 09:06

If you’re trying to clean up and polish the clear lense then brasso works a treat, used it on yellowed car headlights to restore them back to clear, I had the brasso impregnated wadding. Google it for more info :thumbs:

Mike J wrote:
Thanks Kev, I will give toothpaste a try.
Slug, Im just trying to see what I can achieve without spending lots of money (Del and I have lots in common).

The internal metal case is galvanised but still has lots of surface corrosion, anyone with advice on how to prep it for painting?

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Re: Restoration and recalibrate Avon scales

Post by Mike J » Tue Aug 13 2019 09:44

Matty wrote:
If you’re trying to clean up and polish the clear lense then brasso works a treat, used it on yellowed car headlights to restore them back to clear, I had the brasso impregnated wadding. Google it for more info :thumbs:

Mike J wrote:
Thanks Kev, I will give toothpaste a try.
Slug, Im just trying to see what I can achieve without spending lots of money (Del and I have lots in common).

The internal metal case is galvanised but still has lots of surface corrosion, anyone with advice on how to prep it for painting?


Thanks Matt, I would but I dont have any Brasso in my shed.

As a toolmaker I used Brasso to hand polish plastic moulds, as an apprentice I was given clear perspex delibrately scratched by the charge-hand inorder to learn the correct techniques.
Brasso is also the go-to when running-in a new centrepin.

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Re: Restoration and recalibrate Avon scales

Post by Nige Johns » Tue Aug 13 2019 11:10

Another vote for toothpaste

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Re: Restoration and recalibrate Avon scales

Post by Fastliner » Tue Aug 13 2019 11:17

Mike J wrote:
Fastliner wrote:
This product is very good for removing the cloudy appearance on the plastic dial lenses,

https://www.halfords.com/motoring/car-c ... s-plast-rx

Thanks for the advice. :thumbs:
I actually use Meguiars products on my car and find them superb.

Lense cleaning cont'd;
Just using products I have around the house and cotton buds.
First Hob Bright - it removed the ingrained dirt cut but not surface misting.
Next Jewellers Silver Polish on half the lense - even after five mins the clarity had improved enough to read the numbers.
My final test will be T Cut - on a very small side area incase its to abrasive.
No bother Meguiars Products are very good :thumbs:

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Re: Restoration and recalibrate Avon scales

Post by Mike J » Thu Aug 15 2019 10:06

Any advice on repainting the galvanised metal framework?

Scraped, sanded and dried over a gas ring so now ready for ??????

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Re: Restoration and recalibrate Avon scales

Post by Slug » Thu Aug 15 2019 11:37

You can get specialised paint or primer for galvanised metal but does it need painting?

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Re: Restoration and recalibrate Avon scales

Post by ChrisWales » Thu Aug 15 2019 12:25

davelumb wrote:
Mike J wrote:
davelumb wrote:
Mike, I am disappointed to see you misspell 'lens'. :giggle:

You know Dave when I tyoed it I knew it was incorrect but to tired and lazy to chack it!

:grin:
I'll let you off. :smile: It just drives me nuts on a photography forum, where you'd imagine everyone would know how to spell it! :roll:
You are setting my "bought/brought" tic off :)

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Re: Restoration and recalibrate Avon scales

Post by davelumb » Thu Aug 15 2019 12:35

ChrisWales wrote:
davelumb wrote:
Mike J wrote:
davelumb wrote:
Mike, I am disappointed to see you misspell 'lens'. :giggle:

You know Dave when I tyoed it I knew it was incorrect but to tired and lazy to chack it!

:grin:
I'll let you off. :smile: It just drives me nuts on a photography forum, where you'd imagine everyone would know how to spell it! :roll:
You are setting my "bought/brought" tic off :)
I have that too! :laughs:

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Re: Restoration and recalibrate Avon scales

Post by Kev Berry » Thu Aug 15 2019 14:20

Mike J wrote:
Any advice on repainting the galvanised metal framework?

Scraped, sanded and dried over a gas ring so now ready for ??????
galvanised paint ----comes in a spray tin Mike

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Re: Restoration and recalibrate Avon scales

Post by Crackoff » Fri Aug 16 2019 10:19

Mike go on youtube for this different grades of wet and dry.

When you have cleaned the clear plastic cover paint it with clear lacker to stop it from tarnishing again :thumbs:

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Re: Restoration and recalibrate Avon scales

Post by Mike J » Sat Aug 17 2019 09:47

Crackoff wrote:
Mike go on youtube for this different grades of wet and dry.

When you have cleaned the clear plastic cover paint it with clear lacker to stop it from tarnishing again :thumbs:

Grant :smile:



B hell Grant you, me and this post will give Dave a seizure! :shoot:

Actually I was planning to use rod epoxy not lacquer.

Now found some liquid Brasso so thats next up :grin:

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Re: Restoration and recalibrate Avon scales

Post by Mike J » Sun Aug 18 2019 10:30

The lens is now crystal clear.
Method
Gentle clean with 1200 grade wet&dry followed by 20min polish with Brasso on a 1/2" pad of kitchen paper.

Finally completed the disassembly of the internals following 4days soak in WD40.
Inside
The brass rack is held against the steel pin gear (on the dial spindle) by a 1/4" x 1" piece of spring steel, this had rusted right through so needs replacing. Any water running down the hook stem goes straight into this area, something for all Avon users to take note.
All the brass components were badly tarnished and time consuming to clean.

The stripped frame after being heated on a gas ring and scraped with a blade.
IMG_1831.JPG
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