Love these paint pens!!! I do a lot of murals and theatre scenery and these are great for super fine work - details - and touch ups. Markers bleed thru paint, but these are oil based and dry very fast and hide immediately under even cheap latex paint when needed. They hold up well over time - I've had paint pens in the past that dried out but these can sit for months after use and be ready when you reach for them again. Great colors - goes on just about any surface - dries fast.