I have visited Qantas First in LAX, FRA LH First Terminal and Louge as well as MUC LH First. I am looking forward to the hour spa appointment

. Heading through Thailand from Munich back to Los Angeles, a massage is just what I will need after a week at Oktoberfest!
I worry if my flight from Munich is delayed at all we probably will not be able to treatments. This will mean staying one extra day in Munich or flying (dreaded) economy from BKK to HKT.
Just in case, if I arrive on international First from Munich to BKK with a layover, I can still use the First lounge right?????