Hi JoeZ
That's a good tip
Here's one more, next time you go to HomeDepot/Lowes look at the shelft lining ,it's the same stuff they sale for router pads (at Rockler) ( the ones you and I use to keep the stock from moving around when you use the plunge router on the work bench) it comes in many colors and in a roll about 6ft to 8ft long and about 2ft. wide and you can get it for about 3.oo bucks per. roll.
It also works great in the tool boxes for lining bottoms of the drawers.
Then with a bit of 3M spray glue you have a great push block..
I now have it on all my push/hold down blocks and it works great.
Bj