Does a pardon wipe a record clean?
No, a pardon counts as an admission of guilt (which apparently came as a surprise to Arpaio). So all the stuff you can’t do for having engaged in such-and-such an activity, you still can’t do, because you admitted to doing it in order to get the pardon. A lot of people believe this “admission of guilt” factor is why Don Siegelman never got a pardon.