You are very welcome!!
In fact, I just pulled the chalks down just now...you can see a little light mark on where I "dabbed" my aqua pen(it seemed to leave a shade lighter mark on the chalk, where the wetness was), BUT when I rubbed that part of the chalk...it just wiped away just fine.
Now, I didn't get the chalks super, duper wet, just kind of dabbed the pen into the chalks.