Depending on the room size and your hanging speed, it may take two to six hours before the border and sidewall patterns are installed on one wall, so obviously you'll have to wait that long before inlaying. If your primer starts softening up after two hours, you're going to have problems. I would look for very water-resistant priming, particularly if you aren't a speed demon. There are two ways to inlay a chair rail-height border. Hang the top pattern, then hang the bottom pattern using a scrap spacer piece of the border on each piece to check for the appearance of straightness of both patterns.
Customers are usually in awe at how professional it looks and feels.
If your blade is normally at a 45-degree angle, bring the end in the air closer to the material, to about 20 degrees or less. With the blade at this angle, you'll find it's much more stable and less likely to wobble from side to side. Practice Session Put up a strip of paper to the left and smooth it down. Start to cut at the top, cutting in the middle of the overlap through the two sheets, but only go down an inch. Don't try for speed, just accuracy.