I have found the only way to have a "marking device" anywhere in my shop:
(1) Go to Office Depot and buy case(s) of pencils.
(2) Walk through shop and lay two or more on every flat surface in shop.
(3) Stand at one end of shop and throw large groups of pencils in all directions.
(4) Go to other end of shop and repeat step (3).
(5) Repeat process about once a month.
The same process is used for tape measures.
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