You're correct about the opacity issue using oil-based Sharpies but you are missing an important point. They are OIL-BASED Sharpies. Acrylic markers like Posca can go over acrylic paint, no problem but oil painters can use these markers over oil paint.
You're correct about the opacity issue using oil-based Sharpies but you are missing an important point. They are OIL-BASED Sharpies. Acrylic markers like Posca can go over acrylic paint, no problem but oil painters can use these markers over oil paint.