I don't know. This is on top of the decals on back. The gunk I'm cleaning off the front is on top of the decals, too. But, oh, that foil oval looks so much better. On the front, I can use machine oil, and get color on the cotton ball. Not so on the back. Slowly rubbing her back to some of her former beauty.
On a side note, I mentioned this machine when I went to a warehouse fabric outlet this weekend. The sewing machine lady immediately told me that the timing was off. I think she was trying to sell me a new machine. Ain't happening
