Compressible plug with internal compression anchor

A plug for masking an opening formed by at least one wall in a part to be coated comprising:

• a reusable plug body made of a compressible, resilient material, the plug body having first and second ends, walls defining an axial internal opening having a diameter, said opening being coextensive with the plug second end and extending partially through the plug body to a terminus within the plug body;
• an internal anchor disposed entirely within the plug body, the anchor being spaced from the plug first end and in communication with the opening terminus, said anchor including a threaded neck portion;
• a rod positioned through the opening, the rod having a diameter less than the opening diameter with said rod sized such that the rod abuts the opening and is movable within the opening, said rod further having a threaded first end configured to mate with the anchor neck portion such that the rod first end is attached to the internal anchor by engagement of the threads and a second end to which a compression mechanism is attached;
• and
• a compression mechanism attached to the rod second end, the compression mechanism having a first position in which the internal anchor is moved toward the plug second end thereby applying compressive force to the plug and expanding the plug circumferentially so that the plug may be secured across the opening and a second position in which the compressive force is released so that the plug may be easily removed from the opening.