Digital BW, The Print

I searched the archive and I could not track down answers to these 
two print coating related questions:

1) Has anyone done any testing on the issue of whether or not coating 
with a product such as Hydrocote Polyshield affects the archival 
properties of Piezography carbon prints?

2) When coating Piezo prints with Hydrocote, after a good curing 
period, can these prints be drymounted, i.e., Seal tissue and 
drymount press?