Sorry I missed this message. I had a JFJ find those machines to be junk. Disc resurfacing is a finicky process my success in getting to play is usually very good, with some exceptions.
Gamecube discs that Game Stop has resurfaced have a very low chance of being fixed. Other no resurfaced discs have a good chance. Wii discs that are gold backed are pointless to try, get ruined very time.
PS1 and 2 discs come out pretty good, but results can vary usually they come out very minty but sometimes it leaves swirl marks. Can not guarantee it will not happen, but should be least likely to happen. I watch the discs and adjust the water conditioner or change the pads early if necessary.
I have resurfaced thousands of discs, almost every game I sell on ebay is resurfaced and I have 27,000+ feedback with almost no negative or neutral feedback.
Some people here send me all sorts of discs all the time so my service must be working. Success rates are over 99% for sure. You are welcome to send pictures for me to look at.