Cleaning and repairing the Shellac clear coat on Vintage sewing machine heads
#502

I guess that explains why the decals look like they've had that resin stuff poured over them.
No idea how many coats I put on. 40? 50? They were very thin until the last two coats, which I did apply heavily, just to make sure I had enough room between the sandpaper and the decals.
I wonder how much volume just evaporated? And how much was sanded away?
As I was reassembling the machine, I managed to put a very deep scratch in the shellac on the bed, so that will need repair.
But it forms stitches! Feed not working right and the thread is hanging on something in the bobbin case, but she does sew a little...
No idea how many coats I put on. 40? 50? They were very thin until the last two coats, which I did apply heavily, just to make sure I had enough room between the sandpaper and the decals.
I wonder how much volume just evaporated? And how much was sanded away?

As I was reassembling the machine, I managed to put a very deep scratch in the shellac on the bed, so that will need repair.
But it forms stitches! Feed not working right and the thread is hanging on something in the bobbin case, but she does sew a little...

Last edited by thepolyparrot; 06-25-2015 at 09:15 PM. Reason: Autocorrect hates me
#503
Junior Member
Join Date: Jun 2015
Location: Dallas
Posts: 145

I've been reading lots of Glenn's messages. I'm so thankful to find this board and all these posts! Soon I hope to start stripping the cabinet and treadle parts of the lead based paint. She may not be the prettiest girl on the block, but she'll still be in the family and hopefully very functional.

#504
Power Poster
Join Date: Mar 2011
Location: Somewhere
Posts: 15,510

I saw one of your machines pictures. The one that sews great. I'll be happy with that! I just want to do as good job as I can restoring it. I did the linseed oil / denatured alcohol on a t shirt today. It looks a lot better, but there's this persistent grunge that I can't seem to get off. I originally thought it was the rusty metal where the japaning had come off, but no, it's on top of the paint. It comes off better when it's dry / no oil. You can scratch it with your fingernail, and it comes off in a rusty yellow colored powder. The detergent and water didn't really phase it at all. It's around the decal on the base and different spots all over. I'm wondering if I should keep going until I can get it all off (if I can get it all off). You can rub and rub and rub and get none of it off. Very stubborn whatever it is. Can you or someone advise me what you think I should do?
I've been reading lots of Glenn's messages. I'm so thankful to find this board and all these posts! Soon I hope to start stripping the cabinet and treadle parts of the lead based paint. She may not be the prettiest girl on the block, but she'll still be in the family and hopefully very functional.
I've been reading lots of Glenn's messages. I'm so thankful to find this board and all these posts! Soon I hope to start stripping the cabinet and treadle parts of the lead based paint. She may not be the prettiest girl on the block, but she'll still be in the family and hopefully very functional.

#505
Junior Member
Join Date: Jun 2015
Location: Dallas
Posts: 145

I tried the dremel tool with a plastic brush. It's very slow going, but I'm making progress! I think I'm going to use more oil and alcohol. I even was super careful and used it on top of the obscured decals above the presser foot lever. I think I can see a little more of them now. Any tricks or tips for something this hard to get off?
#506

morganfam7, I'm new to this particular process, but I have used a lot of different materials and I know that you can go from thick grunge to silvered decals quicker than you could ever imagine.
Those ones by the take up lever and on the reverse were awful - absolutely buried in hard brown gunk. It just kept coming off a tiny little bit at a time on my q-tips and then all of a sudden, one of the tiny feathered ovals was smeared!
On this second one, I'm going a lot slower even than I did the first time, to allow any possible clear coat to harden up between cleanings. Gonna be a pain in the neck, but this one is potentially even prettier than the first one, although I suspect the clear coat is even more fragile than the first. I may step it down even further and use only sewing machine oil to clean these.
I have three machines and two cabinets in the works. That keeps me from getting too aggressive with any single project. I hope.
Good luck to you and just keep pluggin.
Those ones by the take up lever and on the reverse were awful - absolutely buried in hard brown gunk. It just kept coming off a tiny little bit at a time on my q-tips and then all of a sudden, one of the tiny feathered ovals was smeared!
On this second one, I'm going a lot slower even than I did the first time, to allow any possible clear coat to harden up between cleanings. Gonna be a pain in the neck, but this one is potentially even prettier than the first one, although I suspect the clear coat is even more fragile than the first. I may step it down even further and use only sewing machine oil to clean these.
I have three machines and two cabinets in the works. That keeps me from getting too aggressive with any single project. I hope.

Good luck to you and just keep pluggin.
#508
Junior Member
Join Date: Jun 2015
Location: Dallas
Posts: 145

I hear what you're saying. I think someone put something on this machine later. I don't think this is all original. After I posted the message above I used the dremel and a plastic type brush on the decals on the back along with lots of oil. I worked on this a long time with the dremel, and you can still barely see them. Definitely no silvering because there's so much on top of the decals. If I use a t shirt or cotton swab and oil, I get nothing off. I can rub and rub and rub for however long, 5 minutes, etc. and I get nothing on the rag / q tip. I wonder if this is laquer.
#509
Junior Member
Join Date: Jun 2015
Location: Dallas
Posts: 145

Thank you for the tips! I really think I'm dealing with something other than the shellac. At first there was this stuff that could be scraped off dry. Now it's like it's bulletproof. Nothing comes off on rags, and it just barely, barely comes off with the dremel brush and oil. I think someone put laquer over the decals, but I could be wrong. If that's what this is, then I may just leave it like it is and move forward.
#510
Power Poster
Join Date: Mar 2011
Location: Somewhere
Posts: 15,510

Thank you for the tips! I really think I'm dealing with something other than the shellac. At first there was this stuff that could be scraped off dry. Now it's like it's bulletproof. Nothing comes off on rags, and it just barely, barely comes off with the dremel brush and oil. I think someone put laquer over the decals, but I could be wrong. If that's what this is, then I may just leave it like it is and move forward.
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