I think this has been covered but a quick search didn't give me the answer I was looking for.
tapping some SS screws into aluminum (mast base blocks on the 31). I really don't anticipate having to undo these anytime remotely soon (previous blocks were bent and I had to basically torque the heads off the previous screws, grind down, re-tap) but thought I might try to at least preserve the options. 4 #10-31 screws ought to keep things solid too. I saw some people mention physical isolation but that isn't practicle in this situation.
spray stuff corosion inhibitor?? how long would this reasonably last? the previous blocks were there for 10 yrs so I figure it might be that long again. I don't think it is reasonable to think that spray on stuff would last that long so I might just forgeeeetttaboutit.