Hi dazl,
I’m not familiar with the model but assuming that it’s not a pyrolitic oven then yes, top temp for a while will burn of most of the grease and fat from the catalytic liners that the shelves sit on. The rest of the oven needs cleaned as usual.
Normally you can take out the catalytic liners by means of a thumbscrew or something like that to let you clean the rest of the oven with good old Mr Muscle and elbow grease. Whatever you do though, don’t get anything on those liners or they will be ruined and, once you do get chemicals on them, there’s no way back.
K.