PLEASE Help me PRO's

Ok guys...i am doing a little research and no one in the regular chat rooms can help me so here it goes...
If you look up mylar on the internet...it is just plain ol plastic film...and guess what...i work where i make plastic....but we do not make reflective plastic such as the mylar you are all used to using...so here is the question...
If someone is able to use flat white paint as a reflector...(i know its not a great one) but it is still a reflector...and is kinda low on cash...would white plastic be able to be used????? i know its not a hard question to answer...but i was really wondering about this and would like some input b4 i dish out 26 on something i might have almost as good of results on with something i can get free of charge...