Amazon.com: Paint pens for Rock Painting - Wood, Glass, Metal and Ceramic Works on Almost All Surfaces Set of 15 Vibrant Medium tip Oil Paint Marker Pens, Quick Dry, Water Resistant :
Bright Uni Posca Paint Markers - 8 Piece Set | Hobby Lobby | 2270312
Sharpie Medium Point Oil Based Paint Markers - 8 Piece Set | Hobby Lobby | 2187458
Sharpie Fine Point Oil Based Paint Markers - 8 Piece Set | Hobby Lobby | 2188399