Is it possible to run the heating paint with AC instead of DC?
Yes, as long you remain within the extra low voltage: https://en.wikipedia.org/wiki/Extra-low_voltage
24VDC or 24VAC or 60VDC will all work fine.
The advantages are better for using DC power, like this one: https://amzn.to/2QlDUK2
Why? Simply because then you can use : https://shop.shelly.cloud/shelly-1pm-wifi-smart-home-automation-1#51…
as it has the range up to and can be used for electrical circuits (up to 3.5 kW) with energy consumption monitoring, overload, and temperature protection.