A kitchen wall that takes six hours of direct sun ages differently to its shaded neighbour. The fix is specification, not fear.
Chemistry first
Quality 2K polyurethane systems carry UV stabilisers; waterborne whites also resist the amber shift solvent finishes show. Specify non-yellowing chemistry for bright rooms and whites by default — ours is.
Colour vulnerability
Deep organic reds and some bright yellows fade fastest in any coating; earth tones, greys, blues and greens hold best. If the scheme is a saturated warm colour on a sun wall, plan glazing film or shading into the project.
Detailing against the sun
Low-E or UV-filtering film on the offending glass cuts the dose massively and protects floors too. Rearranging the palette — pale perimeter on the sun wall, colour on the island — solves it architecturally.