I have a section of smooth tongue & grove cedar siding on one side of my house.  It is a small bump out and has painted siding on either side of the cedar bump out.  I am sanding the old water based semi transparent stain off of it and am going to re-stain with a semitransparent stain from Armstrong Clark.

Will the Restore-A-Deck cleaner and brightener kit damage my house paint?  Do I have to tape off the painted area and cover it with plastic?

I am hoping not, but thought it better to ask before finding out the hard way.