I have just cleaned up my old Skipper 17 prior to sale with Morrisons cream cleaner which is meant for bathrooms etc and in particular baths and it did a great job really quickly. I have to clean my Macwester 30 which I have recently bought and I am tempted to use this cream cleaner again which is the same as Jiff cream cleaner(or is it called SIFF now?)Does anyone know whether it will damage my gell coat which is of course now 30 years old. I would then propose to polish the boat with proper yacht polish. I reason that if the cleaner is safe to use on say a weekly basis on a brand new bath then it can hardly harm the surface of my boat.