How We Test

Our goal is simple: measure what matters to finishes and translate it into recipes you can reproduce. The Finish Lab blends controlled tests with real-job validations so you get rankings that reflect both the bench and the field.

Test Surfaces and Setups We run tools across representative materials: painted cabinet doors, hardwood tabletops, MDF trim, drywall patches, and automotive panels. Each surface has a defined “recipe window” (orbit size, pad hardness, interface, abrasive type/grits, extraction settings) so results reflect practical use—not just bare tool performance.

Finish Quality (Defect Scoring) We evaluate surface quality under raking light using standardized passes and grit ladders. Defects (swirls, pigtails, scratches, edge burn-through) are counted across marked zones. We record defect rates before and after dust-off and under primer/topcoat where relevant to verify hidden defects.

Dust Capture and Air Quality We measure airborne particulates with calibrated laser particle counters (PM10/PM2.5) at the operator’s breathing zone and a fixed room sensor. Tests include connected extraction (matched hose diameter and cuffs) and “no extraction” baselines. We report peak and average concentrations, decay time to background, and estimated capture efficiency to support cleaner indoor jobs.

Vibration Exposure Using a tri-axial accelerometer mounted at the primary grip, we record vibration in m/s². We estimate A(8) exposure to help crews align with HAVS guidelines and reduce fatigue. We also note subjective feel factors (tingle, numbness) and glove interaction when relevant.

Noise We measure dB(A) at the operator ear and 1 m from the work surface in a controlled room, with and without extraction running. We note tonal peaks that contribute to perceived harshness and potential hearing protection requirements.

Speed and Cycle Time We track material removal rate (where applicable) and total cycle time from prep through finish grit. We include abrasive changes and dust management because real job time matters more than single-pass speed.

Ergonomics and Control We document weight, balance, grip circumference, trigger style, pad brake behavior, edge control on profiles, and hose drag with common hose diameters. We test for predictable feathering at edges to reduce burn-through and preserve crisp details.

Repeatability and QA Each test is replicated across multiple units (where possible) and operators. We calibrate instruments per manufacturer intervals, normalize ambient conditions (temperature, humidity), and randomize test order. Outliers are flagged and re-run.

Scoring and Rankings Category scores roll up into four pillars: finish quality, dust capture, vibration, and speed. Weightings differ by task; for example, indoor repaints prioritize dust and finish quality. We publish our weightings and note any surface-specific adjustments.

Limits and Disclosures Our tests are rigorous but not certifications. Samples may be purchased, loaned, or provided; source is disclosed and never guarantees coverage or outcomes. When a product changes mid-cycle, we retest or annotate results.

From Numbers to Recipes Data matters only if it helps you work better. We convert results into surface-specific “recipes” and modular kits you can deploy immediately—reducing steps, waste, and callbacks while improving air quality and finish consistency.