They'll write on anything - clean, dirty, oily, plastic, metal, wood, concrete, blue jeans (oops), and I imagine just about anything else.

I used them to write on hard, black plastic

I am personalizing cheap, plastic sunglasses as wedding favors for our destination wedding

On other surfaces like smooth plastic or metal I was able to remove the paint from the pen with a moderate scrubbing

wrote clearly and easily on hard plastic radio, small appliance

Sometimes you just need to write something on dark plastic and you need opaque marker

My wife had a project for a retreat to decorate hard plastic files - these did the job and look great.

I say decently because on some surfaces like smooth plastic I was able to scrape the paint off easily while on

would like a

Even when NOT using resin this is a poor product as the ink is not good quality and the marker tips fall out as if you'd bought something very cheap

FAST SHIPPING AND A GREAT OIL PAINT, LEAKS A

Now my students use dry erase markers everyday, so I kept the removal trick a

I suppose I'd like them a little larger with more paint as it seemed I burned through em pretty quick.