Have not tried masking paper yet , but maybe in near future . I bent some aluminum on 90 degree , works good for corners . Going to try some 2 by 4 foot aluminum sheets instead of wooden ones I have now . Blocker boards with a kick stand sounds like a good idea . I still use some 2 by 8 foot boards to lay down on sidewalks and end of driveway curbs. Rain here for next 2 days so jobs being postponed . Good to have jobs ahead.