I use an HB automatic pencil to mark my CRP-5 and an eraser (or my thumb) to rub it out. It works just fine.
Pilot16...the CRP-5 features heavily in the Gen Nav ATPL exam so a pencil and an eraser is gonna be the best way. Mark an accurate cross rather than a dot. You have around a minute to solve each Whizz-wheel problem so get it soon and start practising at speeding up! Good luck
