The most difficult aspect of making mock scrapes to describe is where to make them. To aid with determining that, remember what scrapes are: a communication device between deer, and primarily between bucks. So if scrapes are primarily a communication device between bucks, they will occur (or should be made) in areas where bucks naturally congregate, whether that is because of a concentrated food source, a travel bottleneck or pinch-point, high-quality security cover, etc. Basically, mock scrapes will be most effective if they are made in a location where numerous bucks are going to travel through anyways. Make a scrape in such an area, and bucks will find it.
Some of my favorite locations for finding real scrapes or making effective mock scrapes are along field edges (especially food plot edges), on trails or old roadbeds leading to food sources, on trails or old roads near the edge of thick cover, and in trails/old roads along ridgelines, at ridge-line saddles, and paralleling creeks.
When making a mock scrape, having an overhanging limb at the right height (4-5 feet off the ground) is the most critical factor. And as others have mentioned, I see much better results using my own urine as the "starter scent" than any commercial scent.
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