Been using these type (Phone China marker) to mark on steel and some other surfaces. But these aren't ideal (not sure if they're just not well made any more or what), but difficult to sharpen and
Grease pencil - Wikipedia
SHARPIE Peel-Off China Marker Grease Pencils, Black, Box of 12
12 Pack Peel-Off China Markers Grease Pencils for All Surfaces Art
Grease Pencils: Everything You Need to Know
12pcs/Box Peel Off China Markers/Grease Pencils for Glass
Product Description White Sharpie China Marker China Markers, also known as GREASE PENCILS, Leave white markings without skipping on all types of
White China Marker
12 Pcs China Marker Peel off Grease Pencil for Wood Glass Metal Cloth Wax Grease Mixed SH06
Assorted Color Peel-Off China Markers Grease Pencils Set Colored Drawing Marking Crayon Pencil for Coloring Drawing Marking on the Wood Garments Metal Fabrics Porcelain Film Paper Pack of 9
Sharpie Peel-Off China Markers
Create legible marks on metal, glass, china and a variety of other porous and non-porous surfaces No sharpening required – peel the paper wrapping
SHARPIE Peel-Off China Marker Grease Pencils, White, Box of 12
Mechanical, Refillable Marking Pencil that writes on any non-porous surfaces, such as metal, acetate, plastic, glass, and even photos. Red grease pencils are best for marking on transparent and light colored surfaces. Wax lead is non hazardous and non-toxic making it safe to use in both industrial and households. Unlike peel-off china markers, these mechanical pencils can be used fully (no wastage) and can write on wet and damp surfaces.
Listo 1620 - Box of 12 - Black Color - China Markers/Grease Pencils/China Marking/Pencils/Wax Pencils
Grease pencils are also known as wax pencils or china markers.
Accessories: Grease Pencils