Beautiful crx. I had two back in the late 90's, nice clean examples are hard to find. Went from crx's to a dc5, swapped civic hx and now a s2000 and 9th gen for a daily, miss the crx more than anything.
I apply fluid film every year and my underside is flawless here in this Western NY rust belt. Fluid film is a lot softer than your typical rubber coating like Ziebart sells. If durability is your concern I would go with the rubber coating. I use fluid film because I hate wrenching on cars...
Awesome N/A numbers and very clean car! I just recently got my S2000 tuned also put down 603whp 400wtrq on 19psi. I would post pics but don't want to derail your thread.