[TowerTalk] Any harm in pressure washing a tower ?

[Jim Thomson]

Any harm in pressure washing galvanized tower’s, or steel bases, masts etc ?
I have bird crap and stuff on some portions of mine.   Mine is just a small electric
one... but its capable of ripping the paint off of wooden steps  etc, if  too close 
or wrong attachment wand used. 

It would save a lot of time, but I don’t  want to damage the galvanized  surface etc. 
The idea was to use just enough pressure to clean it  without  damaging things. 
I suppose I could use a soft nylon brush and soap and water too...then rinse.  

later... Jim   VE7RF