In the last interview, Axl and Slash did together in the 90's, they were promoting Spaghetti incident. A guy from England asked him about cover a Queen song.
Axl talked about Brian and Slash jamming together, and then he said it would be a good choice cover Dead on Time. link
Weirdly a mate of mine was listening to MOTJ at one of our can clubs and he said 'waiting! play that bit again!' and made me listen to a GNR song and was convinced it was a direct lift. Can't remember which song because of aforementioned cans.