Uni Paint Marker PX-30 Broad, 8 mm Sior and the ink is mixable:

and the ink is mixable: touching the nib of this pen briefly against another Parallel pen filled with a different ink color blends the two on contact

Fluorescent spray paint from Loop Colors

Then this is the solution

This issue features writers such as: Jetski

Loop Tech Spray Paint Cleaner is made to quickly remove paint residues from surfaces

Uni Paint Marker PX-30 Broad, 8 mm Sior and the ink is mixable:Permanent oil based enamel marker that comes in seven different colours. The paint sticks to most surfaces and has a glossy finish. It is frequently used within the industrial sector, but it is also perfect for decorative painting and for graffiti. The marker has an 8 mm chisel tip which you can pull out and turn over if you prefer a round tip. The silver coloured marker is amazing, and we sell lots of them, so now we offer them in a pack of three as