Oven ribs disaster! Help

[Douzer77]

Storey so far: used this thread Chinese Oven Ribs
and marinated ribs last night. Have done this before and cooked for 2 hours and they were yummy. Today had the whole day at home so decided to clean off excess marinade and stick into oven at very low (gas mark 1). and intended leaving them in for 4/5 hours but after 2.5 hours the smell of burning marindate was radiating round the kitchen.

So have another rack of ribs that have not been marinated or coated with anything which i have now put into the oven (dinner is 3 hours away) and am now considering just rubbing these with the marinade with a half hour to go! Am i wasteing my time putting the marinade on at that stage, should i just leave them as is? Can't believe this mess as i was really looking forward to very tender ribs.