Step Four: Next, take the dowel; using a grinding instrument (I used an industrial one because it was quicker) grinds the dowel at uneven intervals to give a rough, rugged, distorted bark effect.

第四步：接下来，开动磨削装置，以不同的间隔来磨削木钉的表面(我用的是工业类打磨器，因为它比较快)，从而获得树木表面的那种粗糙不平、扭曲不定的效果。

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Paths of bark chippings will help to give the impression of a woodland walkway.

用树皮屑铺成的小路会给人以林间小道的印象。

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He showed how paints containing powdered metal can be splashed with acid to create metal oxides that give the effect of natural rusting, and how to make fake tree bark from a mold ingeniously colored using carpet scrapings.

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