Supposed to close on the 410 next week, starting to get my game plan together to address some of the known MX issues. Had a mechanic looking over a few items on the engines, and one that came up is corrosion control. I could pay him to do this work, but paying a diesel mechanic to scrape and paint seems like overkill, so I think I'll do it and use it as an excuse to get to really know the bilge/engines. Do you guys do your own or pay someone? If you do your own, what process/materials do you use?