brz is synthetic leather here and there and the seats are mostly alcantara.
So how often should one reaaaally wash their car? I'm fine with it not looking pristine at all times, but i don't want stuff to be permanently damaged from lack of care.
Don't worry about it so much, it's a cheap car anyways. Just claybar it every 2-3 months and wax it once a month. Use orbital polisher + compounds once every 1-2 years if you're really anal.