Whitener for what?
Hair spray for ink, if you haven’t washed it yet. Shampoo for the collar. There was a product called wisk when I was a kid specifically for the collar issue. Don’t know if they still make it but my best friend’s mom swore by it. My dad’s clothes went to the cleaners so my mom got off lucky.
for what specifically?
try hydrogen peroxide or vinegar
Never underestimate the power of good old sunshine
If long hydrogen peroxide soaking doesn’t do it, dollar stores carry generic Oxy Clean and I would soak it in a solution if that.
Straight chlorine bleach is caustic and will eat the fabric.