UV ink is the best but you need an UV printer.
I don't understand the first part of your question, but pre coating an post coating will be a process for treating the surface for printing. Eg applying a coat of chemical that will help bond the ink to the surface and then drying it (sometimes it will need an oven). post coating will be usualy some sort of spray varnish or laminate.UV ok, but my question :
ecosolvent ink is identical eco-SOLVENT what ink for large format?
What is the pre-coating and post coating ?