>>>>I believe Luis means "varnish."

Sure !. Sorry for the spelling. %-/

So seems that the solderable V-arnish is only manufactured in spray can :(
Would prefer to use it liquid.

More questions about PCB potting/water-resistant/water-proofing:

My PCB manufacturer just sent me a letter telling that he can actually use
"OSP" technology in PCBs. OSP stands for "Organic Solderability Preservatives".

Does anybody knows if this OSP technology can be used to provide good water
tolerance (not to inmersion but splash) being solderable at the same time ??

Then would be similar to apply solderable barnish spray.