Flying LHR-AMS-AUH-MEL return in business, on KL ticket, all KL flight numbers
AMS-AUH and AUH-MEL are on EY metal

Which lounges can I access?:
AMS - on outbound, arriving on KL metal and departing on EY (but KL code) - will it be the KL lounge or the third party lounge EY use?
AMS - on return, arriving on EY and departing on KL - assume will be the KL lounge as outbound flight is KL on KL metal
AUH - EY lounge as inbound and outbound flights on EY metal (but KL code)
MEL - The House lounge EY use in MEL as EY metal flight (but KL code)

Thanks!