Be warned there may be lounge access issues to the QR lounge service if you lounge hop at BKK.
We were just denied access following QR J boarding pass complications. I was also silly enough to leave my Thai Silk Air wifi code in my passport so the staff were well aware I had been in another lounge. Truth be told we had also checked JAL's lounge as well.
Staff flatly told we could not enter as it was against policy but said we were welcome to go back to the Thai Silk Lounge. A quick sticky beak due to the novel experience of flying from BKK did not pay off.
What's more irritating than anything is that the checkout counter specifically said we could visit both lounges.