Can rust be cleaned off window frame?

It looks like the condensate drain line has splashed up sediment rust onto the window frame. Can the rust be removed and with what?

Some CLR and call it good. I think you should note that the problem will continue unless corrected somehow.


Use sno bol toilet cleaner .

mild soap & water 1st

harsher chems
eifs finish may bleach/discolor
may have an undesirable affect/repercussions on thermal window swiggle/desiccant adhesives


Rubbing compound (for automotive paint)