How much GelCoat??

[Yamtt125]

Alright guys,
The time is coming near where i'll be gelcoating the entire boat. Does anybody have an idea of how much i'll need to do the hull, and the inside? I know most of the members here have gone with paint, but hopefully somebody will have an idea of how much i'll need.

Also, has anybody changed the color of gelcoat buy using the color pigments? I'm thinking of doing the hull in iether a sea foam green, or an ice blue. I know the site mini craft sells colored gels, but that prices imho are a little steep, and thats why i was consodering mixing it myself.
-Andrew