Hi there,
the printing bed surface of my SV04 worked well just for a few days. Despite exact bed leveling & cleaning my prints warped or did not even stick to surface without any extra adhesion stuff.
I had been using a FR4 fiberglass plate on my SV01 printer for years without any adhesion issues at all. Therefore I got rid it of that pesky bed coating & put a matching 1mm FR4 plate to the metal plate instead. The bed coating was easy to remove with a hot-air gun. The remaining glue on the metal plate was sufficient in means of smoothness & adhesiveness to keep the FR4 plate in place without any other adhesive. It sticks even during bending the plate when removing prints from it.
/R
Bjoern