I think it is best practice to wipe down the seats (regardless of white, black, whatever) with a damp towel every time you wash your car. Even better if you can give them a quick vacuum with a brush attachment prior. I use Optimum Protectant Plus to protect the pleather...it provides good UV blocking and acts as a sacrificial layer, making stains and scuffs less likely. Its cheap relative to a nano-coating and seems to work great.