So let's assume for a moment that an uncoated baryta paper were commercially available. What sort of additional preparation might be required for use with various alt-processes. Obviously for carbon, it would need to be sized with gelatin, acrylic, etc. What about iron-based processes, Pt/Pd, cyano, kalli, vandyke, etc? Would you just use it straight out of the package?

Just curious for now, but if a product like this were commercially available, I would consider buying some if it saved time.