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On the flip side of that coin, I don't see the time loss even after using PSA for 15+ years.
Perhaps fiberglass dust is a problem or perhaps you purchased old paper. However I personally have never had a dust problem at all with PSA when sanding wood. Back in the late 70's I ran an automotive body shop and we bought the 3M PSA paper in rolls of 250. Even the bondo dust was not a problem for the PSA papers, as long as the paper was reasonably "fresh" and had not been setting on the shelf for too long of a period. In the late
80's and early 90's I was the GM for a 3M wholesale distributor and had my choice and no cost to me to any of the papers that we sold. I became sold on the PSA paper. PSA out sold H&L probably 10 to 1. On thing that may play a problem with PSA however is the temperature. I live in SE Texas and have not had to deal with a cold environment. The colder temperature might keep the adhesive from sticking well. Personal preference I guess as I so not benefit to either type of paper except for cost.Humm... I cannot remember the last time that I had to clean the pad. And after several rolls of paper I don[t recall more than 3 or 4 times.
Still a little more than my local supplier for 50 PSA individually backed for $12.88 in 5" or 6" holled or not. I will say though that you are getting a good price on your H&L.. Who are you buying from?
Not really a cost thing to me as I pass the cost on to the customer. I do this for a living now. I just prefer the PSA.