The paint on the car I looked at is not damaged at all from what I can tell. So would waxing it every so often, and the fact that it's only a few years old, not prevent there from being any metallic-related sun damage?To properly protect your paint look for a reputable detailer. Get the paint corrected properly and do a glass coating or similar. It won't be cheap but the coating will last about 2 years depending on which product. I personally prefer the Gyeon coatings. Expect to pay in the R5k range.
Auto armor et al just scratch your paint and use a glaze that covers imperfections for a short time