Always be proud of a Weber kettle rescue, no matter what.
That looks like a nice one, and will be a great cooker. I love my 3-wheeler for low 'n' slow.
The handles appear to be in very good condition. Here is what I recommend for them if you want them to last:
Remove, then rub them with 0000 steel wool to get rid of the grime / grease.
Then apply a coating of tung oil, then finish with a couple three coats of spar varnish.