For my Jag XJ6c, I'm at the finish stage now and not sure how to proceed. May need a grain filler first, I keep seeing "primer" mentioned but for a clear topcoat on wood? Any suggestions for a topcoat? I've used a good bit of Waterlox but I just realized it's for interior use. Car will see enough UV to disqualify. I know I could get the high build glossy finish I'd like with SPI UV clear but not sure if this is the right choice for wood. It's a Santos rosewood veneer on an original plywood dash. Any help would be appreciated.