Yellowing sides

[coyote]

Hi I have a swift royale about 10 years old, the external sides have yellowed somewhat. The previous owner had a go at cleaning a small part of one side and seems to have succeeded in making it white again, but he clearly gave up and I have no idea what he used.

I've had a look at things like boat cleaning products but haven't found anything which jumps out at me, has anyone got any suggestions? And I don't think kitchen cleaner or the like will do it, well it certainly hasn't when I've washed it. Gets the front and the rear nice but not the side panels.

Thanks

 

[Geo]

Hi coyote Me thinks your gong to need a mild cutting compound, T cut is not quite up to it, you need something like G7 and a polishing mop
Geo