AP has a good cheap mop. If you don't care about a few dollar difference, just get whatever Grog or Krink mop you want, they're not much different.

 

Get a cheap ass bingo dabber from the dollar storeto use as a mop, add a little white paint to it to get a pastel color or the same color to get it vivid but more opaque, shake it, use it only on smooth surfaces.

Get a king-size sharpie or pilot. If you want an ink style pen.

Markal paint sticks are cheap af and work great on ruff surfaces, so you don't need risk your nib or the sponge of your mop