Can you plaster over that ‘Make Good’ shite stuff ? Ceiling looks awful😩

Use thistle bond it then reskim the ceiling

Remember every coat adds weight to the ceiling. Too many coats will eventually cause it to crack, so make sure you have solid joists and the original board is well fixed. You'll need a couple of bags of multi-finish.

For best results, prior to skimming; scrape the high spots away from the artex so the final coat of plaster can be applied as thin as possible but still cover the background. Each coat of plaster will ultimately add weight to the ceiling so it’s always best to take steps to reduce this in the first instance. Simply take a trowel or floor scraper and work across the whole ceiling until the pattern is lighter, this ensures weight kept to a minimum and should ensure a top quality finish with no ripples or background showing through. If scraping cannot be accomplished and the artex is heavily patterned. I would suggest over boarding the ceiling with new plaster boards screwed to the joists as this will reduce overall weight on ceiling and reduce chance of cracks etc. This would be my preferred method and how I would go about doing the job in my own house. Or another option is to first coat over the artex with thistle bonding to delete background pattern, then leave to dry, PVA and re-skim. N.B prior to this step ensure the ceiling is secure and not hanging or cracking in places as addition weight will be added with this process.

Yes, can be skimmed over but first use PVA Primer and then thistle bonding and just after skimming.