Well, not yet anyway

I have scrolled through the forums and searched but I was not able to find the specific piece(s) of info I need.

Am flying SFO-ICN on OZ (discounted Y), connecting to ICN-BKK-DEL on TG (full C class) 3 hrs later, with a 6hr cxn in BKK. I have a RCC membership and am *Gold.

I will really want to take a shower - either in ICN or BKK - because I have to attend a dinner first thing upon touchdown in DEL. I believe there is an SQ lounge in ICN that has showers - will I be able to use it since I am not on any SQ flights? Does TG have a lounge in ICN and if not, do the Executive lounges in BKK have showers? I think only the First Class lounges there have the showers.