Durafil for filling pits?

[Magnumwill]

I have a Dan Wesson 44 Mag that I picked up dirt cheap due to a lot of surface rust and pitting. Knowing this was going to be a beater pistol I am not too worried about its looks. But the my tinkering has led me down the rabbit hole to possibly try and fill them then apply a different finish over it. I came across Durafil, but also heard of people having luck with JB Weld and other 2-part epoxies...

Anyone have first-hand experience with how this might actually work out?