Step 1, lots of "before" pictures
Step 2, lots of sewing machine oil
Thank you for the warning about PB blaster on the paint. Ok, only for exposed metal, I think I will wash it gently first to see what may really be rusty as compared to dusty. The movement is so smooth! A missing shuttle bobbin just makes things more exciting.
Is the kerosene or lamp oil or liquid wrench for the possible rust instead of using PB blaster?