I wouldn't recommend it. There's far too much air and space under where the artex textures are. So it easily moved over time. If you can, then I advise either giving it a lick of paint or getting a plasterer in to skim it.

What is the best way to cover Artex?

Scraping off artex is a tough job, not to mention dangerous if it contains asbestos. Therefore, the option preferred by the Pros is to cover the artex with plasterboard.

Can you skim straight onto Artex?

If you find that your Artex contains asbestos, there are still options for dealing with it, but they are more limited: Skimming Over Artex. ... If you have patterned Artex, it's possible to coat it with PVA to achieve a flat surface, and then skim it. Stippled Artex can't be treated effectively in this way.