I bought 2 baby tiger oscars about 1.5 months ago and i just noticed they have little white pieces of skin hanging off of them (not alot just a few here and there). i know its not ick could they be fighting?
If they are picking at each other (or get spooked for some other reason) they could also have cut/scratched themselves on something in the tank (rock, wood, filter intake, etc.). Still, seeing it would make it a lot easier to help.
What size tank are they in? If they're in too small of a tank they might have troubles tolerating each other. I wouldn't jump the gun and sell them, if the tank is too small that might be your problem, or a target fish might be the answer if your tank is big enough.
It is absolutely, positively NOT good for 2 oscars.
I dont know how old you are or what experience you have with keeping fish, but that is a terrible answer without more explanation telling exactly what you mean. A 90g is BARELY sufficient for 1 mature adult Oscar...so I dont know how anyone could think it would work for 2. If you mean at 1-5 inches, it could work...but why get fish you cant keep long term?