I feel your pain as I did the same with my stainless steel oven. I rubbed some oil gently on it and it did help, but the t cut idea sounds good!

Are you saying the glass splashback is the wrong size because it doesn’t go all the way up to the extractor fan? If so I’d guess that they’ve installed a standard size as opposed to a purpose made size. If so l would just take that one down and get a taller one made. You could always have the splashback all the way across the wall. l don’t think it needs tiles too. You could add a tint of colour with the emulsion,

They’re fine to use otherwise they wouldn’t be manufactured. However glass is a better material. It will need templating and is more expensive than laminate but is easier to clean. You can choose a BS or RAL number to have the glass sprayed to, but if you leave it clear the colour of the emulsion on the walls will show through so you don’t have to worry in future about respraying it.

Hello, Congratulations on your new kitchen, we hope you're enjoying it! We understand that choosing kitchen tiles and backsplash could be confusing, there's so much in the market! You could go with a similar material you've used for the worktop, so it feels and looks continuous. You could also go with a mirrored look to expand the space, visually. We love Kit Kat tiles, they're making a comeback in the market. I'll attach a few images so you can get some ideas! We are Bespoke kitchen and wardrobe designers and provide free-of-charge initial design or quotation services. Our showroom is based in Notting Hill, London, but our services all over the UK.