Hi, I will chime in just for the Halibut,
I coat emulsions on glass and only glass. I coat not only silver emulsions but also Pt/Pd/Au photo reactive coatings and dichromate /pigment coatings . I never use a subbing. I find that surface preparation is absolutely critical. I have my, rather elaborate, glass cleaning procedure published in www.thelightfarm.com And in www.alternativeprocesses.com. I never get frilling. My process of cleaning glass might be too much trouble for some people. Basically , if a layer of water stands on a vertical sheet of glass without breaking, you should be alright.