I Am Restoring 1960-1970s Tek equipment with blue aluminum cabinet covers, stored for decades with wide tape, which left yellow adhesive over wide areas.
So, isopropyl alcohol 70%...does not remove the adhesive well. It spreads it around and needs a lot of force.
And petroleum distilates like "Goo Gone" work but affect the blue finish.
What are the best solvents to remove old dried adhesive without damaging the blue finish?