just thought id share my stencilling . iv always done this to my ladders its just 1 extra deterrant to theft. whether its made any difference i dunno but nobodys ever taken em. i first prepped the area by lightly sanding it then used car paint primer filler in an aerosol. then a spray aerosol of gloss black for the top coat . After waiting a few hours for it to dry i stencilled on my phone number using green Acrylic paint. Acrylic is very hard wearing. i had my previous ladders marked up exact same way and after 8 yrs paint was still almost perfect.