I would sense if you are afraid of heights, which is a pretty sensible
response IMO, or as Clarkson said "it's not speed that's the problem,
it's hitting something hard and coming to a stop quickly is the
problem", then how about hiring a scaffolding tower if you are
determined to do it yourself? If you want to really go for it,
rawlbolt some anchor points in the wall and get a harness - but that
will restrict movement, you need to make sure the fixing is *really*
secure. When you add up costs find out how much two days of a
painter's time will cost and spend your time on something else IMO

clive