PAPS has been acquired by Hahnemuhle and is now sold as Hahnemuhle Protective Spray. It seems to be the same stuff.
It dries almost instantly and is not sticky.It is usually invisible and has little effect on appearance of print surface with the exception of large areas of absolute black where some discontinuities in surface reflectance may be observed from an acute angle when back lit. Be careful not to breathe the spray in. Use it outside or in a spray-booth. Either hold your breath or use an appropriate mask.I believe it is best to let prints dry for a couple of days before spraying,preferably under absorbent barrier paper.
Good luck
Brian
Pharos Editions