How to remove hard tree sap from car bodywork

I had bought a car from my best bud, but it had some very hard sap all over the top. My friend had worked his ass off with hot shampoo and done a valiant effort and got alot off. But there was still 50odd spots left on. I tried almost everything to get it off. Autoglym tar and sap remover. TFR
, a nail to scrape the top off . A light cutting compound. Even in desperation some light thinners. But nothing worked easily. Until I heard about medical IV disinfectant wipes.

They are the little wipes that they clean your skin before an injection, I guess they sell them at pharmacies for diabetics and other IV users.

The ones I used were made by Clinell and have "2% Chlorhexidine in 70% alcohol" .

£5.11 ($7usd) for 200 Clinell wipes now in 2019

Or

£1.49($1.90) for 100 UHS wipes (Same thing different name).

Or go into a hospital or pharmacy, they'll sometimes give you a few if you ask nicely.

As you can see its like magic. Follow it with a shampoo and ideally a polish.