I received the replacement rear spar doubler from Van's today. It took all of 5 minutes to deburr and countersink the correct side this time. I can't remember if I mentioned it before, but for whatever reason, a couple of weeks ago I accidentally flipped the original part over during my prep work and countersunk the wrong side. Thankfully, all of the mistakes I've made up to this point have been on very cheap parts that are easy to replace! In the grand scheme of things, I'm more than happy to shell out $10 here or there for replacement parts to get the final quality I want.
I tried to prime this part really quick using the little Harbor Freight airbrush I used on some small parts a month or so ago. It turns out that my grand plan of just capping the tube of the airbrush and being able to pick it up and spray easily was pretty far fetched. I had cleaned most the airbrush up after my last use, but apparently not well enough. The tiny, tiny parts were clogged with old primer. I cleaned it up again and got it working okay, but since the whole point of it was to make priming small batches of parts easy and fast, I think I may give up on it and go back to spray can primer. The spray can primer I have now is just ridiculously smelly, so I'll grab another brand once it runs out. The airbrush works really well for what it is, but it's just not as convenient for grab and go priming as I was hoping.