hhmmm.....never tried it with claybar before. i applied it with a wax applicator before buffing off with a microfibre cloth.
that seems to work well for me as i get to spread the OCW evenly over the panels (applicator wont absord OCW).
usually im using microfibre cloth to apply and buff it at the same time. thus way tends to have uneven application (just my 2 cents)
im comfortable with the applicator and buffing off with microfibre.
will try the OCW with claybar next and see how it goes. thanks for sharing.