I always get confused on this stuff, so thought I would pose my question here.

Flying from SFO to BKK end of next week. Leg from SFO to ICN is via United Global First. Leg from ICN to BKK is via Business Class on Asiana.

My question: Upon arriving in ICN, would I have access to the Asiana First Class lounge? Or, would I only be able to enter the Asiana Business Class lounge?