Quote Originally Posted by bighit View Post
I hope you find its ok. . my nephew left a HW80k in the barn and it had rust in the barrel.I used some penetrating oil tht we used at work (Freeway https://www.amazon.co.uk/L-S-Enginee.../dp/B0051NSFPS ) and a cheap airgun cleaning kit.

It worked out ok for that barrel.
It's a bit of a risk to be honest because I'd have to get it grafted onto a gun just to test it so I'll probably not bother.. I'll see when I get it..