Thanks guys. I started by using the two lights at 45 degrees and metered them but it looked terrible with lots of glare even though I tilted the painting. Anyway, a long story short. I ended up with clam shell lighting (softbox on top coming down and on bottom going up. I just feathered the light on both ends. So actually the softboxes were facing straight and got featered light on the painting. Worked pretty well. Images attached.