Christus Mansionem Benedicat
Found several interesting sites while looking up more door blessing info for my friend. Some articles say the chalk should be blessed. Will attempt to get chalk blessed after Mass tomorrow. I'll bring her different chalk if possible. The way I've been losing things lately, I decided to put the chalk in my purse now - so I can't leave home without it. Then I'll put mine in a safe [but not too safe] place so I have it for next year, too.