have a permanent caravan annex with rather unsightly white polystyrene ceiling bats approx 4m x 1m (4) with aluminium dividers holding them in place.
Would like to paint or cover these as they are quite ugly and also have dents and holes to add to their imperfections!
Paint seems the easier option but being polystyrene a reaction might occur if using wrong type? Thinking a thick textured paint would certainly cover the dents and marks if this was an option?
Rob from memory you can use acrylic water based paint on foam. It must be waterbased and will take multiple coats. I suggest you get a test pot and test a small piece of foam before starting on your ceiling though. JDE
I apologise for the delay in my reply. I see you've already received a helpful reply from @JDE and I agree with their answer. It is a general rule that you can paint polystyrene with water-based paint. As with all uncommon solutions, it is best to try a test section first to ensure there is no adverse reaction.
Please let me know if you need any additional information or had questions.