Homebrew PCBs

Hi there,

        Do anyone know a coating which i can apply over the PCB 
after the etching process.  That coating must be protect the copper 
tracks by corrosions and it should make it easy to do the soldering 
as well.  At the moment I am using "Rosin" as the coating.  But I 
dont have a good base to mixing it.  If anyone know a good base for 
Rosin pls let me know with any other coatings as well.  Coz Rosin is 
not solder-friendly.

         Cheers
         Udara