Hi Don. I'm glad to see the Oriental is ready to fly. Are you going to maiden it before next weekend? Our meeting is on the 19th.
When I painted my last plane with white DC lacquer over gray DC 540, I could see the gray through some places. I sanded it back off and tried the Duplicolor DUP1689 white primer, expecting it to be the same as the DC 540, but it was not. I didn't hurry to sand it like Ty suggests, and it turned hard as a rock. At the time I wondered if it was a reaction with the remnants of the original coat of 540 that made it harden, but all I know is I might as well have been trying to sand epoxy. It wouldn't budge. Big mistake. On the up-side, it didn't take much white lacquer to cover it back up. And my scales told me it was lighter than before, so what could have been a disaster worked out okay after all. I still have that can of white stuff, so I'll play with it on a test board if I ever decide to try it again.
Rusty