DIY Wood Finishing Diagnostic & Solution Guide

Many DIY woodworkers, especially those new to specific techniques like epoxy and polyurethane, encounter unexpected issues. This user's problem with 'unmatched areas' and 'strange' appearance after sanding and applying poly indicates a clear need for diagnostic knowledge. A comprehensive, easy-to-understand guide (digital, book, or even an interactive app) that helps identify common finishing problems, explains their root causes (e.g., moisture content, sanding technique, material compatibility), and provides specific steps for resolution would be highly valuable. This caters to a persistent pain point in the woodworking community, reducing frustration and improving project outcomes.