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Old 28th Aug 2018, 12:25 am   #1
Michael Maurice
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Default Garrard RC4 needs respraying

I'm restoring a radiogram which has a Garrard RC4 autochanger (circa 1936) The top plate/chassis is in a poor condition and needs stripping and respraying.


Has anyone done this before?


How should one go about it?


Would it have been a gloss or satin finish?
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Old 28th Aug 2018, 8:55 am   #2
D Cassidy
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Default Re: Garrard RC4 needs respraying

Hello.
The first thing to consider is how good a result you want. To obtain the best result then a lot of effort needs to go into the preparation. Everything would need to be removed from the deck including riveted badges, the original finish should be completely removed, sandblasting is good as it won't damage the metal below the paint, you could use paint stripper then wire wool or other abrasives but this is very laborious. Once you are happy with the condition of the deck then spray the deck with primer filler in light coats, they need to be flattened with 1000 grade wet and dry paper dipped in water and washing up liquid, again time and prep will give the best result. Some motor factors make up aerosol paint so they could well make up a suitable paint of the colour you need don't use water based spray paint, its awful to work with. Again flatten the paint with wet and dry between coats. Finally give the job a couple of coats of lacquer and burnish once hardened.
You could of course take the stripped deck to a car coach works to get the job done.
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Old 28th Aug 2018, 3:55 pm   #3
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Default Re: Garrard RC4 needs respraying

If you wanted to spend the money (and the time to completely strip the deck plate), stove enameling might be the way to go. The enamelers will sandblast back to the metal, but charge quite a lot (reasonably) for correcting any surface imperfections due to rust etc.
I think the original finish on these was gloss, but rather more subdued than today's paints. For complete authenticity you might have to use a gloss paint then rub it back with very fine wire wool once it's fully cured.
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Old 28th Aug 2018, 4:12 pm   #4
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Default Re: Garrard RC4 needs respraying

Sandblasting no longer happens because it is dangerous. Modern alternatives would be walnut shells or perhaps glass beads, depending on the finish required. Once cleaned off, the surface should be treated to a couple of coats of Lechler 29107 epoxy primer before flatting back to accept a top coat. The final finish can be anything and the choice will dictate how far the surface needs to be flatted. However, 800 grit dry will do almost everything, a solid 2K colour would be happy at 400 dry though.
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Old 29th Aug 2018, 9:51 am   #5
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Default Re: Garrard RC4 needs respraying

Hello.
Sandblasting is still used that I can assure you. Its possible to buy kits for professional power washers to do the job, messy yes but not banned.
https://www.centurywise.co.uk/pressu...blasting-lance
Agreed there are many ways to repair this deck but to attain the best finish it would have to be fully dismantled and stripped back to clean, rust free and smooth metal.

Incidentally two pack paints are particularly dangerous and the operative should always use an air fed mask, infact are these cyanide based paints not now illegal?
Probably better to pass the deck to a professional to do the job these days with strict H&S

Last edited by D Cassidy; 29th Aug 2018 at 9:57 am.
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Old 29th Aug 2018, 2:02 pm   #6
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Default Re: Garrard RC4 needs respraying

I am taking it to a professional this afternoon for them to look at.

I've stripped the deck except for the two controls at the front, the knobs will not budge.
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Old 29th Aug 2018, 2:45 pm   #7
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Default Re: Garrard RC4 needs respraying

Quote:
Originally Posted by D Cassidy View Post
Incidentally two pack paints are particularly dangerous and the operative should always use an air fed mask, infact are these cyanide based paints not now illegal?
Cyanide based paints? I think you have been watching too many "whodunnit" dramas! There are no cyanide based paints although some have a hardener which contains isocyanates. Just because a paint or filler is 2K (2 component) it doesn't follow that it will be an isocyanate type. The Lechler 29107 referred to earlier is such an animal and so normal precautions are all that is required.

Dry SANDblasting is not permitted commercially. You might find a DIYer doing it, but the Silicosis risk rules it out for businesses. See the Nanny document here: http://www.hse.gov.uk/foi/internalop...00-299/273_18/
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Old 30th Aug 2018, 9:07 am   #8
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Default Re: Garrard RC4 needs respraying

Hello.
Even modern 2k paints are risky see this info.
http://www.hse.gov.uk/mvr/bodyshop/isocyanates.htm

This is well worth reading in its entirety.
http://www.adocars.com/elf-ado/elf/paint.htm

The early Sikkens two pack paint had cyanide in its chemical makeup and I particularly remember the warnings on the tins back in the early 70's.
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