Originally Posted by
Padgett
Well needless to say, you have your work cut out for you but it will be worth it if you take it slow and be patient which it seems like you are.
Get some PB Blaster on/in the SP, preferably from the bottom too, tiny squirts at the top and try to keep it off the paint, it can work miracles.
Hang in there, the Dad's shop plan is a good one, you can't have too much help, tools, resources when dealing with challenges if you want the right outcome, again patience is key.