I just got my boat from the shop where I had the hull regelcoated from the waterline to the rubrail. The difference is remarkable and the 46 year old fiberglass looks like new.
In my case, the job cost 1500.00, and included removal and reinstallation of all hardware with 5200, adding an epoxy sealant to the hull, repainting the boot stripe and a little of the bottom paint, and waxing the finished product.
I can recommend the guy who did the work to anyone in the Mpls., St. Paul area. He finished when he said he would and at the bid price.