The 15” alloy wheel design is shared with the Ertiga, but these come finished in black on the XL6. We do wish Maruti had offered a larger wheel size to give the XL6 a stronger stance. For a better understanding of compatibility and riding comfort, we would suggest you to take a test drive. Follow the link and select your desired city for [dealership@https://www.cardekho.com/Maruti/cardealers
No, Teflon coating and Chassis paint are additional services that you can deny if you don't want them. Moreover, we would suggest you to have a word with the brand directly as they would be the better people who can assist you in this case.