Old crotchety make-up is a very bad thing to use.
Old make-up will burn your skin and cause irritation and reddish-rash like reactions. I've seen this happen with most old make ups.
most all common baby powers..such as johnson and johnson it just plane talc with maybe some fregrance...it works decent but wont stay visable for more then a few hours tops just by itself.
but its breathable and wont clog your pores like most costume make-up.
Your best bet is to buy some light toned liquid foundation...which is real make-up...and some powder...baby power or like a powder cover up (a compaq) with thoes little round applicators inside.
The liquid keeps the powder on but still allows your skin to breathe.
And you wont have to worry about it running/smudging or being generally uncomfertable.
And you can later incoperatle it into your everyday make-up later, if you so choose, cause thats whats its suppose to be used for, that way you wont feel like you wasted your money for just one day of cool costuming.
If you have any other questions feel free to pop me a line...
~stephanie
Nero Oregon's old costume and make-up lady