I installed a rosette in a Euro Spruce soundboard, leaving it slightly proud so that it could be scraped level. Well, the rosette seems to be very hard and dense material and I'm having a terrible time getting it level with the top. I've tried bench scrapers, sharpened and leveled on the Burns sharpening system; sandpaper on a very flat, hard sanding block, etc. No matter what I do, the method always seems to remove a tiny bit more of the softwood top than the rosette, therefore leaving it still proud of the surface. I also tried finishing the top wood (french polish) to make it harder, but to no avail.
Any help or advice would be greatly appreciated.