Suncure just fills the hole with resin which dries rock hard when put in the sun. Its okay for small dings, especially if its not got through to the foam.
But not so great if its a 'proper' ding
Kitesurfers way is the best way without a doubt, but you can get a ding repair kit which is a middle ground - it contains resin, filler, some glass matting, and wet n' dry. Its pretty easy to fix even some fairly large holes with one of these kits. Just follow KS's instructions!
