Forum:Spell Counters, To be used or not to be?

Okay so me and my friends were just in a duel, my one friend was sitting idly by while I was getting attacked seriously he just sat there...doing nothing!! Not a thing at all...it was rediculous but...I digress. Now to the main point can Hannibal Necromancers effect where you remove a spell counter from it to destroy a face up trap be used to destroy a trap card such as Sakuretsu Armor? Or even more specific can spell counters be used by a cards effect on an opponents turn?