Rust builds up in the rear wheel wells along the edge of the quarter panel. This is because of the black moulding Honda used to seal the edge against rocks and sand.
Foremost though, make sure the timing belt was changed after 7 years or 105,000 miles. One common sign is the tensioner for the belt becoming noisy and rattling. Here's what to expect:
prelude :: MVI_4321.mp4 video by Shimee_San - Photobucket
prelude :: MVI_4319.mp4 video by Shimee_San - Photobucket
Check the oil level because the H22 burns oil a little more than most people are comfortable with. Constant driving at low oil levels can result in leaks and even more oil consumption.