PETOS--- Refinish Restorer turns into a varnish-like hard coating very simular to varnished wood furniture if not buffed-off within 10 minutes (per instructions) after application.
Excess build-up can be removed with a "terpintine substitute" per the manufacturer's instructions. Basically, use paint thinner on a rag and lots and lots of elbow grease to get it off. Be sure and wear a face mask or enjoy getting high off the paint thinner fumes.
For the official manufacturer's instructions, please do a "search" for specific thread entitled: "Alternative To Gatorback - Faded Cladding Solutions"
Once at the thread, then scroll-down and look at Posting #30
In addition, a printable "PDF" file is also available by clicking on the "link" in Posting #30