Hello! I am a small rubber stamp manufacturer, and about half of my stamps are wood mounted stamps (versus self-inking). My long-time supplier of wood blocks went out of business recently. My new supplier is great but the edges of the block where the wood has been cut are too rough (the other two edges have a finger groove). It just looks unsightly. Besides hand sanding every single block, is there a better way to smooth the edges just a bit? Preferably en masse? I do not want to ask my new supplier to do it because the pricing is already a bit higher than my old supplier and I'm sure if they sanded the edges it would add additional cost. Thank you in advance!