considering i only have 2 tiny detents (not chips) from rocks over the last 3yrs, i think im good without clearbra.
different story on the rockers though, i use clearbra there and im glad i did for front tire kickup.
wax does well for bugs and tar/contaminants, but not rocks. painter's tape actually work very well for most rock impacts. do a few layers on the very front of the car. i speak from experience driving 2200miles. it's refreshing just to peel it off once at destination and walla, no bugs, no chips. just clean off any residue you might have with some RC car motor spray/WD40/GooGone, and wax afterwards.