I have never relished the idea of arbitrarily replacing head bolts and so I have pretty much the same SOP as you for inspecting the bolts to determine reuse...........or not.
If I have 1 bolt that does not pass muster I replace them all.
I clean the bolt threads with a fine wire wheel or by hand with a wire brush prior to reuse.
I run a tap into the holes in the block and blow out debris with air afterward.
I never reuse any "torque to yield" bolts, but we only have one of those engines in our fleet now.