I have been searching for some reviews and professional input on what would be the best possible product to use for temporary court lines on a maple gym floor?  

MFMA does not recommend the use of masking, construction, electrical, duct or adhesive tape to mark temporary court boundaries on the surface of a finished maple floor.  Most tapes used for temporary markings have a different coefficient of friction than finishes applied to the maple playing surface and can impact a person’s ability to start, stop, and pivot. It is also quite likely that the tape, when removed, will peel away layers of the floor’s surface finish.  Removing the surface paint/finish and exposing the maple can result in additional chipping and peeling of the remaining paint/finish in adjacent areas.
In addition, most commonly available tapes contain adhesive resins that can etch or stain the floor finish or even the maple flooring below the temporary markings. If additional game lines are needed, MFMA would suggest contacting your sport floor contractor about adding those game lines to your floor's surface.
Disclaimer: The MFMA provides general information to architects, specifiers and consumers. The MFMA, its members, officers and agents disclaim any responsibility whatsoever for the accuracy or applicability of these guidelines under all circumstances and conditions.
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