I use the standard 3M sanding blocks, as found in your local hardware or big boxy store, quite a bit:
(http://www.papawswrench.com/vboard/index.php?action=dlattach;topic=25419.0;attach=58276;image)
(http://www.papawswrench.com/vboard/index.php?action=dlattach;topic=25419.0;attach=58278;image)
I know they're not always as flat as they could be, but they get the job done for me, and it's easy to install sandpaper on them.
I acquired the little green 3M sanding block at the left at a recent sale (sorry for the fuzzy picture; don't know what happened), and own a couple of the Warner blocks, to the right, and use them quite a bit too:
(http://www.papawswrench.com/vboard/index.php?action=dlattach;topic=25419.0;attach=58280;image)
You can see the profile of the Warner block, useful for some molding and other tight-spot sanding:
(http://www.papawswrench.com/vboard/index.php?action=dlattach;topic=25419.0;attach=58282;image)
If ever I get around to removing rust from some of my hand saws, I may dedicate one of the Warner blocks to that: nice flat wooden "platen."
I use the 3M type, but also the sanding pads from Harbor Freight.
Quote from: Papaw on February 11, 2020, 04:34:01 PM
I use the 3M type, but also the sanding pads from Harbor Freight.
And I might, too, if I didn't find a sufficient supply of 3M pads at yard/estate sales for 50 cents to a dollar.
I like the size of the green 3M block. But even though I have a big 3M and the wood Warner type, I always end up using a selection of wood or rubber blocks I've collected over the years.