We were trying to "paint" plastic bottles for a project, and found that the various types of paint we used peeled once dry. I found an old "marks-a-lot" marker at home and decided to try that. After one application the sample bottle looked great so I figured any permanent marker would do and the next morning started using the ones we regularly use at work. I was so disappointed with the results - after two applications the bottle didn't look nearly as nice as the first sample. I will be using this over the more common brand going forth for actual "permenant" and/or "complete coverage" needs!