If you are over limit, be prepared to pay tax. Unlikely on a case.
If you are considering flying, note that RT tickets will be a lot less than a OW. If you are considering flying, note that unless you have OW status, you'll have a 23kg total checked baggage allowance.
All inbound luggage is x-rayed at SCL customs.
Depending on cost, you might be much better off shipping your wine directly from Mendoza.