Can anyone help me with a graffiti related question Vol. NYC especially

[Gill Baka Esq. LLC.]

Alright so my little brother came to visit me this weekend from Florida and one of his interests besides being a hypebeast (yea I deaded you on NT, Kush,don't even make an account now

) is graffiti. He has some skill inthe art of Graffiti and I look out for him so I wanted to know if anyone knows maybe some online spots or even graffiti spots in nyc that I should take him toget some stuff.

He asked me specifically for something called MOP's, so if anyone can hook me up with some info on how to ascertain or some spots in NYC to go to look atsome supplies with would be appreciated.