FOLLOW THE RESTORATION: Pebbled shellac on Cylophone cabinet
Posted: Thu Jun 22, 2017 3:38 pm
I do like a good challenge. This Cylophone cabinet came to me with a peculiar problem. The original shellac finish on the doors....and ONLY the doors....had pebbled up terribly. The remaining shellac finish on the cabinet was flat, showing typical light alligatoring, which would clean up just fine. In repairing this, there are several thoughts one must process:
A. How to remove the pebbling
1. Sanding?
2. Stripping?
B. How to maintain or obtain correct color to match the cabinet.
1. Wood dye?
2. Keep original color?
C. What type of finish to apply?
1. Re-flow the original shellac?
2. Shellac?
3. Lacquer?
Too many people resort to completely stripping the finish, and I can understand why. It's easy, and in most cases the entire cabinet will be stripped along with it. As you can see, this cabinet is a beautifully preserved (albeit very very dirty) original that was looked after, and mostly unmolested (aside from having its horn removed, and a hole drilled through the back to run speaker wire through (what were people thinking??). To the amateur or aspiring restorer, or even seasoned restorer....there is ALWAYS something to learn, and new skills to discover. Some skills find you by accident!
The doors themselves are flat. After talking to a few friends about how to tackle this, I decided to take the time consuming route of SANDING the pebbles off until I hit the flat original shellac finish below! I removed the original latch decoration (which came apart all by itself into 3 pieces that I would have to glue back together later on), and trim strip. 600 grit......too weak. 400 grit....too weak. 200 grit......still too weak! 100 grit.....pass..... I'm serious here. I used 60 grit garnet sandpaper and a a large rubber sanding block! This sandpaper cuts FAST and I compare the experience to using a backhoe to remove the frosting from a birthday cake. Too much pressure....and you break through the original finish down to the wood! So, a lot of CAREFUL passes with the sanding block exposed the finish underneath. I then carefully used 200 and 400 grit to spot-remove some of the alligator shadow.
As you see....there are some light areas where the sandpaper broke through the micro thin under-finish. Here's how I tackled that. Living dangerously, I took a paper towel and wetted it lightly with some denatured alcohol. Wiping from the center of the piece, towards the light areas, I was able to transfer some of the color and finish back to the weak spots. TAKES GUTS. I don't like mixing wood dye and having the fill-in color mismatch after finish is applied. I let the alcohol air dry, then gave a quick fixtive spray with satin sheen lacquer. Stay tuned......I have a ways to go on this one! BUT, look at the final pic.....compare with the other original door. Quite a difference. AND, most importantly, I didn't add wood dye....I retained the original color.
A. How to remove the pebbling
1. Sanding?
2. Stripping?
B. How to maintain or obtain correct color to match the cabinet.
1. Wood dye?
2. Keep original color?
C. What type of finish to apply?
1. Re-flow the original shellac?
2. Shellac?
3. Lacquer?
Too many people resort to completely stripping the finish, and I can understand why. It's easy, and in most cases the entire cabinet will be stripped along with it. As you can see, this cabinet is a beautifully preserved (albeit very very dirty) original that was looked after, and mostly unmolested (aside from having its horn removed, and a hole drilled through the back to run speaker wire through (what were people thinking??). To the amateur or aspiring restorer, or even seasoned restorer....there is ALWAYS something to learn, and new skills to discover. Some skills find you by accident!
The doors themselves are flat. After talking to a few friends about how to tackle this, I decided to take the time consuming route of SANDING the pebbles off until I hit the flat original shellac finish below! I removed the original latch decoration (which came apart all by itself into 3 pieces that I would have to glue back together later on), and trim strip. 600 grit......too weak. 400 grit....too weak. 200 grit......still too weak! 100 grit.....pass..... I'm serious here. I used 60 grit garnet sandpaper and a a large rubber sanding block! This sandpaper cuts FAST and I compare the experience to using a backhoe to remove the frosting from a birthday cake. Too much pressure....and you break through the original finish down to the wood! So, a lot of CAREFUL passes with the sanding block exposed the finish underneath. I then carefully used 200 and 400 grit to spot-remove some of the alligator shadow.
As you see....there are some light areas where the sandpaper broke through the micro thin under-finish. Here's how I tackled that. Living dangerously, I took a paper towel and wetted it lightly with some denatured alcohol. Wiping from the center of the piece, towards the light areas, I was able to transfer some of the color and finish back to the weak spots. TAKES GUTS. I don't like mixing wood dye and having the fill-in color mismatch after finish is applied. I let the alcohol air dry, then gave a quick fixtive spray with satin sheen lacquer. Stay tuned......I have a ways to go on this one! BUT, look at the final pic.....compare with the other original door. Quite a difference. AND, most importantly, I didn't add wood dye....I retained the original color.