surely experience plays a big part. but how many forum members have only seen someone go to town on a rusty rotor with a roloc and then gets the idea that its ok to use rolocs on their engine.
ive pulled apart and junked tons of engines over the years. ive seen some pretty rough cylinder bores. anything you miss is gonna take a little bit more out of your cylinder sealing.
my point is that a razor doesnt require air and a pack of 100 is 10$, enough to regasket a whole damn motor. with a razor you can push the crap away from sensitive area's (oil passages, crevices, etc), and even shovel it away and wipe it in a rag.
splurge on a nice blade holder and you'll have 15$ into the ability to clean and prep all gasket surfaces with very little chance of contamination.
the world is damned full of 1d10t's. and id hand em a rag soaked with gasoline and a pack of razor blades well before i told em to use a roloc or any rotary device to clean the motor.
have you read the studies on the effects of those discs on the RA? those ****ers will remove aluminum quite fast and the primary issue being that small deposites always cleanup with a ground in trough around em.
plain and simple OEM's and almost everybody doesnt want em used. hell some dont want you to use razor blades, but blades are cheap to toss when a nick occurs.
im sorry gentlemen...but ive seen so much god damn carnage over the years that id rather an idiot have an empty revolver vs one with a round or two in there...
**** half the lim gasket jobs i pull apart are seeping out all those nice little grooves someone ground in there....yay
http://www.rmpparts.com/Warranty/Technicalinfo/GASKET SURFACE CLEANING.pdf