I have used their red heavy cloth-backed discs, and love them. They're more expensive than the stearate discs, but have much greater durability. I use the stearate discs only when sanding epoxy or when sandpaper clogging is imminent! The red cloth discs are so durable that loading them up and throwing them away quickly seems like a waste.

Klingspor is much cheaper than anything I've ever found locally, and the abrasive is very durable. I would be hesitant to try anyone else for a better deal, unless you could get a recommendation on the other outfit.

Shawn

: I've been checking out the Klingspor site prior to ordering sanding disks.
: The site lists type PS22,PS23,PS31 and PS33 disks in the size and hole
: pattern I need. The PS 23 and 31 are "open coat" disks which
: I've heard are good. The PS33 is "stearate" coated, which is
: supposed to prevent clogging. The PS 22 and 23 use heavy paper (E and F,
: respectively) vs. the light paper (B and C) on the PS 31 and 33.

: Which type of disks are best for boat building applications?

: Are there any sources that are cheaper than buying direct from Klinspor?
: Someone suggested www.woodysworkshop.com . The prices are better, but
: they don't give details about the products they sell.