Rear arch stone guard fitting

Hi.

whats the best way to fit rear arch stone guards. Drill the arches and use the plastic rivet / plastic clip approach or bond the guards to the arches? All ideas and suggestions welcome.

Thanks.

I'd bond with PU sealant. No holes,no rust.

Bonded/glued mine on. As Jay says no holes no rust.

bonding all the way, you want the least amount of holes in the bodywork as possible.

the stuff like tiger seal is really strong bond, you wont need much for those.

Agree with these guys. Mine are also bonded on. 

Thanks everyone for your help. Looks like bonded is the way to go although im not looking forward to this job.

When fitting the stone guards do the two pieces circled in red go level with each other as they are in the picture. Thanks.