Custom Shop Ultra Flow Urethane Clearcoat with KH2021 Hardener, Gallon Kit Red to Gold Shift Improve the quality of the

Improve the quality of the final application

Micro air control valve at the head of the airbrush enables accurate micro fine spray control

and abrasions for maximum safety protection

Change both cloths often during this cleaning procedure

The sandpaper can then be used until the grit has fully worn down

Custom Shop Ultra Flow Urethane Clearcoat with KH2021 Hardener, Gallon Kit Red to Gold Shift Improve the quality of theCustom Shop KH2021 Hardener is a professional grade urethane activator specifically engineered for use with Custom Shop KC2020 Ultra Flow Clear Coat. Designed to deliver consistent, high performance results, this hardener ensures proper curing, adhesion, and durability in automotive clear coat applications. Formulated for a precise 4: 1 mix ratio with KC2020 clearcoat, KH2021 provides reliable activation that helps produce a deep, high gloss, wet look