It's been a long time since I built much out of balsa, but I made a camera mount for my Freewing 64mm A-10 out of balsa, and was looking at putting a paint finish on it. The last time I did much in wood, I used sanding sealer on the balsa before the finish. I looked at a couple of craft stores tonight, both of which sold balsa stock, and neither had sanding sealer. Even looking on Amazon, there was only a couple of results. Has the use of sanding sealer fallen out of practice, replaced by something better? Or is it just that working in balsa is increasingly rare, such that few places stock more than just the rudimentary supplies?