I've been learning on and off the guitar solo to sweet child o' mine for a while now and no matter how hard I try I just can't play the fast part. My brain knows every note but my fingers won't move fast enough.

Any tips/finger exercises to make my fingers move faster or am I just not trying hard enough? Should I just sit on my chair playing away for hours until I crack it?
Unfortunately practice is the only way to get solo's like this down

Although certain exercises you can easily find online will help it's not a quick and easy path to playing solo's and fast melodys, I found that the devil is in the detail, starting slow and practicing the vibrato and phrasing correctly then build up to the song tempo seems to be a good start

Hope i helped!