Well, I got at it. In typical fashion, I ended up taking everything apart and cleaning the whole thing up. Didn't paint anything as that requires the propane to be disconnected and we'll leave that until such time as we are not living in the RV.
What did I find? Not much. The spark seemed to always go up. That would have been great for natural gas, but propane is heavier than air. I used a little fine sandpaper on, and around the igniter area. Now the spark seems to go down at least 50% of the time. The burner lights now but I think it could be better.