Here is a really nice chart on Phenolic Chemical Resistance that shows Isopropyl Alcohol having no effect on Phenolic and listed as an "A" for cleaning:
(Isobutyl should NOT be used)
(Isobutyl should NOT be used)
Phenolic Chemical Resistance Charts, Good to Severe Effects
Phenolic Chemical Resistance Charts, No Effect, Minor Effect, Moderate Effect, or Severe Effects, Chemicals, or Agent, Epoxy or Phenolic Grades
composite-laminates.com