Paint protection, as in some aftermarket product applied that supposedly extends its life, or at least its shine? Was it applied when new back in 2011, or more recently? If 2011, I doubt if there is anything left of it anyway after 6 years. It's just a decent quality synthetic wax job.
In any case, wash with any car or RV wash product as much or as little as you like, i.e. when you think it is dirty enough to warrant the effort. Just avoid products with degreasers, ammonia, bleach, etc., anything that can strip off wax or orhter coatings.