I am doing a CCU on a commercial retrofit with new tempered glass. I experimented today with mopping Goof Off over a few calk smears (exterior) then steel wool following. It left an intensely tenacious residue - GG3/Ecover soapy water mix didn't touch it. I could get through it with my finger nail and it would rub off with a huck towel and some serious elbow grease but pretty time consuming. I thought I would try denatured alcohol to cut the GO residue followed by GG3/Ecover soapy water scrub and squeegeed off. Now I have a residue from the denatured alcohol in a broader area. Any suggestions on quick way to cut through this garbage without a ton of elbow grease?
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