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Cabinet and Chassis Restoration and Refinishing For help with cabinet or chassis restoration (non-electrical), please leave a message here. |
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1st Aug 2019, 9:40 am | #1 |
Dekatron
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 5,997
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Scrape your radio cabinet
You don't need to wreck your radio with a chemical paint remover. Do what the professional restorers do and use a 'Cabinet Scraper'. Dried out cellulose varnish will scrape off very easily and with a little practice you will not damage the veneer,
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1st Aug 2019, 2:26 pm | #2 |
Octode
Join Date: Nov 2003
Location: Bath, Somerset, UK.
Posts: 1,804
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Re: Scrape your radio cabinet
I use a skarsten scraper, they are well made, but it is hard to obtain replacement blades.
Neil
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1st Aug 2019, 2:47 pm | #3 | |
Dekatron
Join Date: Feb 2003
Location: Cottingham, East Yorkshire, UK.
Posts: 5,737
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Re: Scrape your radio cabinet
Quote:
A 'cabinet scraper' is a thin hard steel plate on which a burr had to be created using a burnisher: https://www.axminster.co.uk/bahco-47...SABEgJzAfD_BwE Here's how the burr is raised so you can use both sides and all edges of the scraper: https://www.youtube.com/watch?v=dOmAWhgdEJA Veneer is only 0.6mm thick and it's very easy - especially on rounded edges, to rub through it if you resort to using sandpaper.
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1st Aug 2019, 6:44 pm | #4 | |
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Location: Maroochydore, Queensland, Australia.
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Re: Scrape your radio cabinet
Quote:
In addition the color of the coating can be obvious in corners and crevices where its difficult to scrape.They only way to remove this properly is with a paint stripper, not mechanically with scraping and especially not with sandpaper. But the thing is, it has to be a type of benign paint stripper that does not damage wood/veneer or the adhesives that attach that to the surface in the case of a veneered surface. The attached photos show three restored cabinets, all done with the aid of the correct paint stripper for the task that I have talked about on other threads. No damage at all to the wood or adhesives, no scraper makes either, no "practice" needed to avoid veneer damage. Sometimes veneer can be quite soft, if it is indented with force it stays that way then marks and lines can be very difficult to hide, especially with a satin or gloss finish. So I would recommend against scraping surfaces, unless the existing old cellulose coat is very suited to it, poorly adherent and very lightly colored. |
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2nd Aug 2019, 11:31 am | #5 |
Hexode
Join Date: Jan 2018
Location: Portsmouth, Hampshire, UK.
Posts: 421
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Re: Scrape your radio cabinet
This is from my own personal experience & I'll be the first one to admit I am NO woodworking guru!
On my wooden radio cabinets I have used either Acetone or cellulose thinners (dependent on what type of varnish) with fine wire wool pads (like Brillo but without the soap) & paper towels. Lots of ventilation required! It can be a lot of hard work but very rewarding nonetheless. The "melted" varnish can also fill blemishes too. I did think about the scraping method but felt there was too much chance (in my paws at least) of causing more damage.
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2nd Aug 2019, 12:27 pm | #6 |
Nonode
Join Date: Jun 2004
Location: Norwich, Norfolk, UK.
Posts: 2,543
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Re: Scrape your radio cabinet
I've only tried a cabinet scraper once and have to admit that I made a right mess of the job. The unlucky cabinet had some patches of missing varnish so every time I made a pass with the scraper it took a little bit of varnish off and then gouged out the wood veneer where the varnish wasn't there. Trying to do inside corners and fiddly bits like speaker frets also proved impossible for me to do. It's definitely a skill that I do not possess .
Regards David
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2nd Aug 2019, 1:46 pm | #7 |
Nonode
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 2,583
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Re: Scrape your radio cabinet
Cabinet scrapers are designed for levelling large flat sheets of solid timber and are typically used in conjunction with a pair of winding sticks. They are not suitable for use on veneers.
Alan |
3rd Aug 2019, 1:33 am | #8 |
Nonode
Join Date: May 2016
Location: Cornwall, UK.
Posts: 2,315
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Re: Scrape your radio cabinet
I was told when I worked with a joiner that cabinet scrapers were for finishing hardwoods instead of sandpaper. As an oak veneer (say) is a hardwood just in a thin section, a scraper should be a good way to remove flaking varnish, and easier to keep flat than sanding to avoid going through the corners. This same joiner used to make me scrapers out of old saw blades - those ones that can't be sharpened because of their hardened teeth.
I used them on my uncle's Bush SUG61 and it came up a treat, with no damage to the veneer as the material removed each pass was so little compared to the varnish layer. I would have thought for flatting down a large length of timber a jointing plane would be the better option and a lot easier on the thumbs! Perhaps there are larger scrapers than I have used, but I've never been able to take off enough material to consider using them for levelling. |
3rd Aug 2019, 7:13 am | #9 |
Nonode
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 2,583
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Re: Scrape your radio cabinet
In terms of hand tools a jointer/try plane would indeed be used for coarse levelling of a plank or board and this might be followed up with a jack or smoothing plane. A cabinet scraper is a finishing tool used to obtain a smooth level surface and, in skilled hands, will produce a finer finish than abrasive papers.
Veneers are often little more than 0.5mm thick and in my view trying to remove varnish from them with any kind of dry scraper (cabinet, paint, hacksaw blade etc) is a mug's game. Even if the area is perfectly flat and smooth such attempts are quite likely to end in tears. I wouldn't even contemplate curves and inside corners. Overall a suitable chemical stripper is a far better option. The one thing about modern 'safer' strippers is that they are usually very effective at removing thin layers of varnish even if they sometimes struggle with multiple layers of old paint. I've recently used the Wickes version successfully on a pair of water stained speaker cabinets. Alan |
3rd Aug 2019, 8:59 am | #10 |
Dekatron
Join Date: Nov 2010
Location: Oxford, UK.
Posts: 4,942
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Re: Scrape your radio cabinet
The only time that a cabinet scraper comes into its own are woods with interlocking grain, where a regular plane would produce tear-out (like sapele) or are extremely hard (such as ebony or cocobolo).
I would not scrape veneer, unless it was something like a burr with awkward grain direction, and then only gently. Craig |
3rd Aug 2019, 9:03 am | #11 | ||
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
Posts: 8,809
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Re: Scrape your radio cabinet
Quote:
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A digital radio is the latest thing, but a vintage wireless is forever.. |
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5th Sep 2019, 7:28 pm | #12 |
Triode
Join Date: Aug 2019
Location: Peel, Isle of Man
Posts: 34
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Re: Scrape your radio cabinet
I’ve recently got my dads old HMV 2010 With Garrard TT and realised upon dismantling it two things.
Firstly it’s a mass produced thing made of chipboard and glue, mass produced kind of thing which is fair enough. Secondly, it’s a bit battered and affected by damp in places. It looks “ok” , but a thought occurred , maybe I could buy another piece of nicer furniture and retro fit the TT and speakers etc into that. Tell me this is a dumb idea please. Do others do this kind of thing ? |
5th Sep 2019, 8:12 pm | #13 |
Nonode
Join Date: Jun 2007
Location: Coulsdon, London, UK.
Posts: 2,152
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Re: Scrape your radio cabinet
How loud do you like to play your music?
Placing the turntable near the speakers is potentially asking for trouble. Sound vibrations from the speaker can affect the stylus, record and cartridge and create distortion. |
5th Sep 2019, 8:19 pm | #14 |
Triode
Join Date: Aug 2019
Location: Peel, Isle of Man
Posts: 34
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Re: Scrape your radio cabinet
Mmmm good point, perhaps I could make my own cab to the same dimensions, but I guess it’d look fairly naff, maybe I should remain purist, it 8smafter lol a 1964 mass produced thing no point pretending otherwise.
I can see me getting another one .... |
6th Sep 2019, 12:27 pm | #15 |
Dekatron
Join Date: Oct 2003
Location: Southport Lancashire, UK.
Posts: 3,221
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Re: Scrape your radio cabinet
If you are going to take it out of its case you may as well get a "proper" hi-fi set up. 1970s amplifiers and some turntables and speakers are relatively inexpensive if you avoid the pieces that have a "following" and will sound better than the HMV.
Chipboard and glue is not a bad way of construction in itself it just makes refurbishment a bit more difficult. Most earlier radios and radiograms were made of veneered plywood. You are unlikely to find anything cabinet made of solid wood. Accepting that it will never be hi-fi the HMV should not sound too bad if working correctly.
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