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Old 19th Apr 2023, 9:15 pm   #1
Tractionist
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Default Cloudy/Yellowed TR82 Dials

Someone posted a question as to whether the 'Restobright' process worked on [formerly but now cloudy/yellowed) Bush TR82 tuning dial 'knobs' - but I couldn't locate the OP (sorry mods).

Well, I have a few of these - some of which I've attempted to re-cut with appropriate paste hitherto - without success. But fuelled with 'the joys of Spring' and abundant sunshine - I thought I'd give one the 'Restobright' treatment.

Result! It does seem to work and certainly doesn't do them any harm. I've got one 'cooking' at present and it certainly seems to be much improved.

Unfortunately I didn't take any 'before' photos - but if anyone is interested I will post some 'after' shots.
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Old 20th Apr 2023, 7:28 pm   #2
Philips210
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Default Re: Cloudy/Yellowed TR82 Dials

That's good to know Retrobright works.

I've had limited success with paint cutting paste such as T cut when the yellowing is only slight. For very discoloured dials I've used a very fine wet and dry abrasive paper, typically 1200 or 1000 grit and then progress to a cutting compound. It can take a fair old effort to obtain good results but should be successful given a little patience. Brasso may be worth trying too.

Regards,
Symon

Last edited by Philips210; 20th Apr 2023 at 7:31 pm. Reason: correction
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Old 20th Apr 2023, 9:27 pm   #3
paulsherwin
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Default Re: Cloudy/Yellowed TR82 Dials

Cutting compounds don't work because the discolouration is too deep. I didn't know that the Restobright process works with cloudy transparent plastic - thanks for the info.
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Old 21st Apr 2023, 4:32 pm   #4
locknut
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Default Re: Cloudy/Yellowed TR82 Dials

Certainly good info, I wouldn't have thought to try that.
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Old 21st Apr 2023, 9:47 pm   #5
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Default Re: Cloudy/Yellowed TR82 Dials

Attached progress to-date - it's not perfect, but greatly improved ..... this was a particularly 'sad specimen' featuring some sort of etched or superglue type staining on the outer face too (so I cut and polished it after the Restobright treatment.
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Old 22nd Apr 2023, 11:56 am   #6
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Default Re: Cloudy/Yellowed TR82 Dials

A couple more shots for your routine edification:
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