Hi kirk here...what I like about oil-transfer is the image is matt, when the pigment is laying on a gelatine surface if not viewed straight on then the glossy image can be distracting to some, when transfered it not only becomes matt but the pigment is absorbed into the papers fiber it take's on the paper's textures too..the image becomes part of the paper rather than just laying on top of it also the pigment image is permanet it will last forever and never fade away indeed the older the paper becomes the better it looks also an oil-print can easily be damaged, scratched the pigment can take years to dry..yes that's right years it stays tacky this is because the pigment cannot easily be absorbed into the gelatine , and the gelatine can be attacked by mould and nasty silverfish love to eat gelatine material...so really oil-transfer is the best route to take.
Coating for Bromoil...The suggestion I gave for coating matrix's for RC Paper..that's coating the dry matrix with a stiff pigment applied with a paint foam roller is based on the Oleobrom Process full instructions are on the alternative photography website under oleobrom process....kirk