I wouldnt be too stressed.
There mainly talking about S15 silvia's/180sx, Nissan GtR's, supras, drift pigs etc....pretty well everything out of Japan and all the stretch Limos and Raws cars with Major mods
Havent heard of any car being turned back for flames down the side....under the laws that be, a paint job is NOT a modification due to discrimination laws...got a link somewhere that says something about it, however, SA states in order to get rego, the car must be "As it came from factory"...but thats a state law not federal
Unless Federal law "States that"...(As it came from factory), its still open for interpratation but still eligable
If you have been given an Import approval.....the car is eligable...SIMPLE
Thats why they state..."do not ship your vehicle untill your approval has been processed"