Assuming they actually adhere to
the rules, you will not get access.
International First and Business Class passengers as well as SkyTeam Elite Plus members traveling in Economy Class enjoy complimentary access to most SkyTeam partner lounges worldwide. Simply present your same-day ticket for an international SkyTeam airline flight. As a SkyTeam Elite Plus passenger, you can even invite a guest to join you in the lounge.
I added the emphasis above, but you can see that they should require a same-day SkyTeam ticket for access.
S.