Meguiars, Mothers and 3M do "marine spceific" polishes, cutting compounds, waxes etc. But really, any cut and polish will do the trick - gelcoats and paint/clearcoat are not too dissimilar.

I'd follow up with a wax to protect all your hard work.

use proper stuff, and make sure its not like the orange stuff, it will discolour the boat especially the rubbers

Begin with a liqht acid wash to remove stains (peter G's Clean a hull) works well

Then follow up with a wax restorer like (malco rejuvenator) Much cheaper than 3m finnese-it products and works as well.

Use a lambs wool buff and some technique

If this doesnt bring it up then you may have to apply heavier compound polish.

let us know how you go.

thanx guys and yeah i know  not 2 use those orange 1's

i got some  of this boatcare fibreglass polish extra cut in the morning and started on it   but i dont think its 100% 

i got told to avoid anything with canuba  in it.

discolours the glass or something

After I did the cut and polish to get rid of all the old rubbish, I used Maguires and it worked a treat.

That's my choice.

You buy this at Wilson boating in freo you can get there off Catalano drive they are on the street inside Freo Boat club. All the pro boat detailers use it.

Any further reccommendations on a boat polish. I wanna get the missus to polish my vessel
Are these products one application, or are there 2-3 steps?

I'd suggest copious amount of alcohol if you want to lure the missus into polishing your vessel.

gold.

Ha ha, here I am at work, and she is home drinking my beer

will see how it goes

Depending on the condition of gel / paint and how fussy you are you might consider wet n dry from 800g to 1500 then cut then polish the key is to wax though this is the sealer.Most peopole finish on a polish and say job done not so wax will gloss it more and help to bead water for a longer duration. This process of waxing must be applied  every 3 months to protect the exterior all the polishes mentioned above will work and the tip on peter g hull wash is gold wear gloves!!.Never wash yo r boat in cheap detergent as it will strip the wax and polish straight away a lot of hard work for nothing  the exterior finish is just as important as that on a car and for resale it is wise to keep it maintained good luck.

Good luck mate.