Take care of the standard resins if you go deep, they produce a lot of heat, Small puddles etc you can also use the new two part super clar 5 min epoxies as well,
Heres how I did a little water effect if it helps
http://smallshopeu.com/Water_Panther%20photo%20page.htm
Alasdair * [img.nr] http://smallshopeu.com/Water_Panther%20pics/FINAL_%20RIGHT%20BIG%20Splash_ALL.jpg[/img.nr]