Allen- I still have pics of your boat in a folder on my web site
http://www.casdvm.com/photos/Alans%20boat/ 
I think the best thing to do with gel coat cracks/spider cracks etc is to take the bull by the horn's and grind them out totally/excessively and then laminate some heavy matt over the ground out area. Then you can sand, fair and paint or gel coat. This may be a good opportunity for you to re paint the gunnel's and inside of the boat if there are lots of cracks present.
strick