Hmmm... propan-2-ol is safe on just about all computer
parts (it will
soften some glues, and IIRC it can attack some optical plastics, but it's
safe on things like disk and tape heads).
Watch out... the CDC 9762/9766 heads use a glue which will disolve with
isopropyl... The only thing certified to clean them is the paper punch
card stock and maybe trichlorotrifluroethane.
The other item which had a problem with alcohol was the glass bead liner
tape on the TE/TU16, TU45 and TU77/78.
They could handle it sparingly... be very careful not to over use it or
you'll be scraping off the glass bead tape and reapplying it.
Bill