I did the interior, not the exterior
the exterior is, as you say, way too dangerous
It was funny how it came on me...it hit me very suddenly that...hey...if I slip, it is a long way down, and I am not stopping once I start.
Then I began to notice the grit under my shoes, how my fingers were gripping, and my sphincter tightened right up.
Funny, just thinking about it right now makes it all come back!
And there were guys who went a heck of a lot higher than I did. Crazy bastards.