Welcome aboard! You've probably seen my note on your other post on this same topic, but generally, we don't like people to ask the same question twice, but as a new member we tend to show a little leeway. Don't worry about it.
There's a sticky at http://forums.buckeyefirearms.org/viewtopic.php?f=6&t=10097
that you should have a look at, but it's not mandatory, and could be sleep inducing. No need to go past the first few pages.
About your question: I expect the gang will have better answers, but I'll toss some stuff out. To some extent it actually depends on the crime itself, rather than the ORC of the conviction. The Courts have decided that if a conviction smells like a DV conviction, it IS one for the purpose of screwing you over via Lautenberg.... Even if the conviction for walking on the grass....
IMHO, this does give your attorney some wiggle room, but it muddies up the works for us, too.
The Clerk of Courts in the County where the conviction occurred is the contact for sealing. They have the forms, etc. $50, I think, but I'm not sure I'd trust them in a case like this without bringing a good lawyer into the game.
We've got some lawyers here, and others, who might be able to suggest somebody.
Dover OH - The former day job had a plant there, can't think of the road, but it was on the way to the dam. I used to get there several times a year. I used to get to Espenschieds (hope I spelled that right) when possible - one of the guys at that plant turned me on to it. Good food then. The plant poofed in the 90's, if memory serves, 'round the time I was let go.