I have grown quite adverse to spraying prints. The water-based coatings may be less toxic, yet one still should never inhale the spray. I'm not a fan of Timeless spray-coated prints. And I wouldn't display that or Print Shield coated prints bare. Imagine taking a wet cloth to it to clean it from spit, sticky dust, fumes from traffic or cooking etc. Wouldn't it be great if the printer could coat the print for us! I had hopes that the new Canon LUCIA PRO Chroma Optimizer ink could be used to seal the hydrophilic coatings of aqueous inkjet papers. I don't know all the ways the envrionment can degrade the coatings or even crack and delaminate them and how long it will take or how bad it could be. Scary.
Ultimately, there is no really cheap option when it comes to anti-reflection acrylic. It will be much more expensive than Artglass WW, but the situation may force one to use it (overly large for glass or customer living in an earthquake-prone area). Custom framing where I am with "museum quality" materials is already extremely expensive, far more than what my clients pay for me to make prints for them. Then jump to Artglass WW and add another 25% to the framing cost. It is not for everyone, but for the obsessed it is a godsend. I consider AR framing glazing to provide possibly the single greatest leap in visual image quality - not being able to see virtually all the print to being able to see virtually all of it.