sourcing map Sanding Sponge Sanding Blocks 220-Grits Medium Grit Sand Block Pad for Kitchen Metal/Drywall/Wood 4pcs : Amazon.co.uk: DIY & Tools
A sanding sponge makes an excellent foot file. The coarse/medium grit ones work best for me and are typically available at Dollar Tree or 99¢ Only : r/lifehacks
Prep Sanding Block Medium / Coarse | Toolstation
3M™ Pro Grade Precision™ Dust Channeling Block Sanding Sponge 80 grit Medium, 2501TRI-80M-CH, 4.5 x 2.5 x 1in, 12/cs | 3M United Kingdom
Foam Sanding Block Fine & Medium | Boat Chandlers & Sailing Equipment