You need to consider if you have a gas or electric cooktop. Zenolite can be applied behind a direct heat source with an allowance of 50mm between the rear edge of the cooktop and the face of the Zenolite for all electric induction cooktops. For gas cooktops, there must be a 200mm space. If you are using an electric cooktop then consider the extra expense for Zenolite Hard Coat which is more resistant to scratching, and check how this product pricing compares with glass. Make sure your installer knows how many powerpoint cut-outs are needed when pricing. https://www.allplastics.com.au/architectural-building-plastics/zenolite-splashbacks?gclid=Cj0KCQjwqsHWBRDsARIsALPWMEP75_QMk17Fx3X57ROmj_wiGqY2si9dKbts6CCnW92vn8mtKtv4pjUaAghVEALw_wcB Best of luck with your new kitchen, Dr Retro of Dr Retro House Calls

Hi johnstoneanne , using Copper as a splashback gives you a couple of things to consider where what material you choose may also depend on the actual look you are after and considerations such as its maintenance, it being fit for your purpose plus that of your budget and to meet the regulations for this if you have a gas cooktop. There are a few ways you can go to achieve a copper splashback; starting with use of actual sheet copper laid onto a support substrate. This is a soft material that can scratch easily and will also oxidize and so you may like to consider applying a clear two-pack coating over this metal during fabrication. Another option would be to use a Laminate material that has an actual thin Copper face layer which also comes with a clear protective coating. You have already mentioned using a Copper tile as an option; where this will also have grout lines. Another option you may consider could be to use an easy to clean glass splashback and use a metallic copper finish backing or if you want an aged copper look, then you could alternatively use a copper photographic image that is printed onto the back of the glass splashback. A glass splashback would be easy to clean, scratch, heat and water resistant. There is also the possible option of using large sheet Porcelain splashback in a rusty copper colour if you are after a more matte finish; using something like perhaps Neolith’s Iron Copper or perhaps their Coreten, where these are heat & flame proof, water and scratch resistant and easy to clean & again eliminates Grout lines being a large format sheet. I hope this is of some help, regards Malcolm.

Sorry didn't finish my post, but I think the marble would work the best

Gloss if you paint well