Hi Richard--
The 50/50 Galkyd Lite and OMS was based on a
this recommendation by Bill Whitaker, but back in 2001. I had started out doing this with the first couple of oils I painted. . . As it had seemed to me the the Galkyd layer would act as an 'isolation' layer. . .
I've gotten away from this approach now in favor of oiling in any flat areas. . . But I recently came across one of my earlier pieces that had never been returned for a final varnish and was struck by what a nice surface the galkyd lite coat gave the painting. So was reconsidering whether to start doing this again. . . your comments on the likely issues with aging of the galkyd layer though make me think the oiling out method is the safer bet. . .