Kayak Repairs

My kayak was stored on someones dock for some time. Just got it and it has loads of spots with sun damage - some spots of bare wood.  How should I fix these spots ?  Should I apply fiberglass and varnish only or should I put cloth also ?  Lastly how wide of an area do I sand for the repair. Thanks!

1st, can you send pics to show the extent of the damage?

2nd, where are you located?  If in FL drop me a line and I would be happy to help you with your repairs.

KK