I fully detail our personal cars a minimum of a 2 times per year and have that down to a system that works well, but I also have a company car (silver Ford Explorer) that I pay to have professionally detailed once a year. Besides that, it gets run through an automatic car wash every now and then or I'll wash it at one of the coin operated places with a high pressure wand. Water stopped beading on the paint about 3 months after the last professional detail. I am not going to hand wash/wax/detail the Explorer, but I'd still like to take care of it and have it look decent. What's an easy to apply (and buy) spray on sealant/wax that I can use during or after drying that will give the paint an acceptable level of protection? Not looking for a concours level shine, just something to use 3-4 times a year to keep the paint in good shape. Thank you in advance for your recommendations.