Thanks Steven, I certainly will try that. About the painting sale, it just happens that I varnish, let it set til dry and maybe previously had made appt. for pickup. I am noticing all that drying time that it looks like that---then no time to correct it.
I will try the linseed for sure.
One more question, have any of you EVER had to go back into a finished portrait for small touch ups. For instance, I have already varnished the final varnish. The client insists on small things, a slight turn up of the corners of the mouth, slendering down a chin area. Couldn't I use straight varnish as my medium and touch these up? Wouldn't that blend into the varnished area?
Thanks all