I am so glad you kept the machine and have cleaned and oiled it and it works well, yippee, that is super neat. There are threads on here that help you with the decals and what to use. Go back to the first page of this Vintage section and there are threads on the top you can read and see what will help you out, I would but I don't know all of that suff
Congratulations on your new machine and saving it from Goodwill and whatever would have happened with it.