yous guys is crazy!!
I would think using CrO3 would be way up there in the BAD IDEA list. As far as I am aware, all Chrome(VI) compounds are carcinogenic, mutagenic, cellulotoxic sons o bitches.
Wouldn't it be smarter to just buy the dichromate??
But then, there's always cyanide.......
See ya around (maybe...)
fukmunchee