| 摘要 |
In substrates, such as wood substrates, having sharp edges, corners and othe r surface discontinuities, in a front appearance surface, non-functional machining, su ch as formation of grooves, is performed on the rear non-appearance surface adjacent the surfac e discontinuities. Coating powder is applied, e.g., electrostatically, to the appearance surfac e of the substrate and the coating powder fused or fused and cured to form a continuous coating on the appearance surface of the substrate. The rear surface machining reduces cracking of the coating at the front surface discontinuities. In some cases, non-functional machining is distributed over the entire non- appearance surface of the work-piece to promote out-gassing of volatiles to the non- appearance surface, thereby eliminating out-gassing-caused defects in the coating formed on the appearance surface.
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