It’s just as the thread title says: I can’t use a spray in single player. That is to say, when I face a surface and press the spray button, I hear the spray noise, but nothing else happens.
Sprays work perfectly in multiplayer, though.
I have Wire, Gcombat+GCX, CAF, ADV Duplicator, hoverboard and spacebuild installed, along with PHX and the spacebuild model pack. Also some weaponry.