UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > General Vintage Technology > Cabinet and Chassis Restoration and Refinishing

Notices

Cabinet and Chassis Restoration and Refinishing For help with cabinet or chassis restoration (non-electrical), please leave a message here.

Closed Thread
 
Thread Tools
Old 12th May 2019, 12:35 pm   #1
David Simpson
Nonode
 
Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,838
Default Ambassador 545 AC/DC

Folks, I've an Ambassador 545 AC/DC to "do up" for someone. As you'll see from the pictures, the surface varnish is pretty awful, but the veneer is OK, although a wee bit stained in places. Top & sides are clear lacquered Mahogany, but after cleaning & blading the front, that seems to have had a brownish scrumbled paint jobby, with what is possibly American Walnut(?) as the veneer(wider wavy grain tinged with black at the grain edges).
So question is, were R.N.Fittons prone to painting over or scrumbling their veneer finishes ? And, is that front Walnut ?
A good pal(thanks Duncan) has kindly donated another 545 which has sustained terminal cabinet damage as a donor(see picture). Incidentally, this one has a KT71(50L6) running de-rated in place of the correct 35L6. And it works, as thankfully the chassis is OK.
Me - not really been involved much with veneered cabinet restoration, so am proceeding slowly & carefully.

Regards, David
Attached Thumbnails
Click image for larger version

Name:	AMBASSADOR 545 (a).jpg
Views:	141
Size:	138.3 KB
ID:	182927   Click image for larger version

Name:	AMBASSADOR 545 (b).jpg
Views:	127
Size:	90.4 KB
ID:	182928   Click image for larger version

Name:	AMBASSADOR 545 (c).jpg
Views:	125
Size:	97.0 KB
ID:	182929   Click image for larger version

Name:	AMBASSADOR 545 (g).jpg
Views:	123
Size:	120.9 KB
ID:	182930   Click image for larger version

Name:	AMBASSADOR 545 (h).jpg
Views:	123
Size:	113.2 KB
ID:	182931  

David Simpson is offline  
Old 12th May 2019, 1:57 pm   #2
Boater Sam
Banned
 
Join Date: Dec 2013
Location: Middlewich, Cheshire, UK. & Winter in the Philippines.
Posts: 3,897
Default Re: Any AMBASSADOR Experts ?

It is probably just brown stain and lots of cellulose lacquer, it makes a sticky brown goo when stripping with paint stripper.
As its a late set, likely it won't be shellac, french polish.
Boater Sam is offline  
Old 12th May 2019, 4:33 pm   #3
Mike. Watterson
Heptode
 
Join Date: Dec 2014
Location: Limerick, Ireland.
Posts: 901
Default Re: Any AMBASSADOR Experts ?

From the 1930s the sets were sprayed. Mass production.
Only very early deluxe cabinets of factory made sets had French Polish which is basically shellac (from a beetle) dissolved in meths and is very labour intensive and needs skill.

Modern Acrylic spray clear paint, like transparent final layers for a metallic painted car is the most similar to the mass produced lacquer coatings. They often used a translucent or opaque base coat spray, called toner, on the raw veneer to change the colour. This can dissolve in some paint strippers.

You can still buy real shellac, for pre-1920s furniture restoration.
"From the time it replaced oil and wax finishes in the 19th century, shellac was one of the dominant wood finishes in the western world until it was largely replaced by nitrocellulose lacquer in the 1920s and 1930s."
I've never understood people "French polishing" radio cabinets, though it's a hobby and why not if you like it. Car Acrylic transparent lacquer spray is closer to authentic and a lot less work.
Polyurethane or some hobby lacquers are trickier, more expensive and less authentic.

Last edited by Mike. Watterson; 12th May 2019 at 4:39 pm.
Mike. Watterson is offline  
Old 12th May 2019, 5:51 pm   #4
David Simpson
Nonode
 
Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,838
Default Re: Any AMBASSADOR Experts ?

Yep, Sam & Mike, I knew it wasn't french polished, just veneered plywood. Other folk on the Forum have said in the past that French Polishing is just for antique furniture, & those expensive 1920's Chippendale furniture quality wirelesses & radiograms. I've found clear car acrylic spray lacquer to be just the ticket in the past. Several coats, not close up overspraying, is the best method, I've found.
It was this scrumble-like dark(painted ?) finish on the front which I'm hoping some Ambassador buff can enlighten me about. Its on both 545's I now have.
Talking of the damaged donor - - Jesus ! - - - am I glad I've stripped it completely down today, before going any further with the repairable one. I've even managed to remove a fair bit of re-usable mahogany veneer off the sides & top. BEWARE - Folk - - those top rounded corners are wafer thin ! NOT steam bent 90 deg. 11/32" six-ply. Just the veneer layer & a similar 0.5mm(or less) thick layer of whitewood ! Will have to be exceptionally careful blading & sanding those corners !

Regards, David
Attached Thumbnails
Click image for larger version

Name:	AMBASSADOR 545 (i).jpg
Views:	97
Size:	42.2 KB
ID:	182945   Click image for larger version

Name:	AMBASSADOR 545 (j).jpg
Views:	96
Size:	75.5 KB
ID:	182946   Click image for larger version

Name:	AMBASSADOR 545 (k).jpg
Views:	102
Size:	90.7 KB
ID:	182947  
David Simpson is offline  
Old 12th May 2019, 5:58 pm   #5
Boater Sam
Banned
 
Join Date: Dec 2013
Location: Middlewich, Cheshire, UK. & Winter in the Philippines.
Posts: 3,897
Default Re: Any AMBASSADOR Experts ?

I don't sand at all.
Just strip and scrape and wash off using a scotch pad - carefully.
Between coats if lacquering use flour paper, or 1200 wet and dry.
Boater Sam is offline  
Old 12th May 2019, 7:06 pm   #6
David Simpson
Nonode
 
Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,838
Default Re: Any AMBASSADOR Experts ?

Sounds a good idea, Sam.
Now that the old phooked cabinet has been stripped of its mahogany veneer, I'm wondering what conditions encouraged de-lamination in the first place ? Cos it came away with very little effort. But, there is no evidence of excessive dampness or moisture ingress. Perhaps the original animal glue was inadequately applied in the first place back in 1947. I'm really surprised that Fitton's cabinet makers didn't re-enforce the corners with some quadrant.
The donor also had a decent un-scratched frequency dial glass, thankfully.

Regards, David
David Simpson is offline  
Old 29th May 2019, 5:55 pm   #7
David Simpson
Nonode
 
Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,838
Default Re: Any AMBASSADOR Experts ?

Set now finished. See summing-up thread post (1945 Ambassador 545 AC/DC ) in "Vintage Radio (domestic)" sub-Forum.

Regards, David
David Simpson is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 12:14 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.