I am finishing a RTW ex-JNB & immediately starting a new one this month. In the past I had no problem getting CX to thru-check my luggage on 2 separate tickets. My concern in this case is the # of flights:

RTW #1 CHC-SYD-HKG-JNB (14hr layover) RTW#2 JNB-DOH-GRU-LAX-MIA

Can I check my bag all the way thru to LAX? I prefer not to clear customs in JNB & just stay in the Protea Airport Hotel. If not to LAX, where should I check my bag to? DOH is only a 2 hour layover. And I refuse to buy Brazil visa on principle. THANKS!