I've posted before of my attempts to halt corrosion of the thermostat bore.
The recent thread prompted me to have another look (I haven't checked since last July)
Here is a current photo with 1954 hours on the engine


Although I have inspected it periodically, I have done no "work" to the surface since the initial "treatment" :
January 2015 - at 1100 running hours


initially I found this condition in November 2014:


The recent thread prompted me to have another look (I haven't checked since last July)
Here is a current photo with 1954 hours on the engine

Although I have inspected it periodically, I have done no "work" to the surface since the initial "treatment" :
January 2015 - at 1100 running hours

initially I found this condition in November 2014:
