[RWilson2526]

The fact that you are calling it "beige" is kind of unexpected...usually when white gelcoat fades it just gets dull and chalky but still stays white....you might just simply have water scum discoloration on it....when I take my boat to Raritan Bay even for a day, the areas that are unwaxed get brown in color...you might get lucky and just be able to spray it down with a hull cleaner and that brown might wash right off. I use the Attwood brand from Wally World and it works like a charm....if it is something more permanent you could first start with a good rubbing compound...3M's rubbing compound works really well but its kind of pricey but I have found it well worth the extra dollars as far as saving labor.....if thats not cutting it you have to get more agressive and go with a wet sand....do some research on what grit to start with....I'm thinking 800 to a 1000.....get the garden hose out, put it on fine mist and start sanding once it looks white again move on and then finish it up with rubbing compound and then wax.....its a TON of work and your arm will be screamin' at you after an afternoon but you should be able to get it back to a brand new finish.