Paul,

that's an excellent chart! It just took me four weeks to arrive at some of those conclusions...

I'll have to check whether my conclusions are in agreement with it. Otherwise I'll have to rewrite all my comments! [:-]

Oops! Just did.

The interesting thing about that table is that due to its vintage, acrylic urethane enamels are not listed. At the time the table was compiled, they probably didn't exist yet! In any case, they would reside at the top of the sheet being the most stable and generally compatible finishes. I suspect they behave in much the same way as polyurethanes (currently at the top) with the exception that they might be able to go over top acrylic and possibly alkyd enamels as well unlike polyurethanes (per the table).

David.