Yes, you can stain your window trim before cutting. Some DIYers will lay out the window trim (or window casing, whichever term you prefer) on sawhorses and stain it. There is a certain value to this, as you can rapidly cover multiple lengths of window trim all at one time. But generally you will find that staining window trim before cutting is a frustrating enterprise because the cutting of the trim and the process of nailing it up will nick and scratch the trim.

It's usually better to stain the window trim after cutting and after it has been installed in place.

My favorite guide for tips about dealing with window trim is the Black & Decker Complete Guide to Windows & Entryways. You will find lots of clear graphics and just enough text to steer you along. Shop Direct - Black & Decker Complete Guide to Windows & Entryways

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