Is it possible to be bigger coving over small coving?

[BeYourselfUnlessUCanBeAUnicorn]

We are decorating our bedroom and there is some very shitty polystyrene coving up. DH has tried painting it to make it look better but it still looks the same. It is very narrow. I haven't actually seen coving this small. Is it possible to get the normal size coving and stick it over the top? DH doesn't think so but I'm not so sure.

possibly, but you would have to get a bit and hold it up to see.

If it's polystyrene, why don't you just get the old stuff off with a broad metal scraper?

Because we have already decorated, whoops. Thought it would cover easily with paint. It doesn't even look like it has been painted at all.

Hi I know homebase do different widths of coving, they do both polystyrene & plaster, not sure if it would go over the existing, worth a try though, it might work.

buy a corner piece, that's more likely to be tricky than a straight run. Also you won't need to buy a great pack.

It's possible to mitre the straight pieces to make a corner, but you should be able to find them readymade.

Adhesive over the joins, sand it down and repaint?