The Damon Applicator is a threaded, stainless steel rod on which the threads are offset from the center so that different locations on the circumference of the rod produce different wet thicknesses.

As examples, the approximate limits are 0.7 mils (18 microns) to 1.5 mils (38 microns) of dry coating for a 55% NVM polyester and 2.2 mils (55 microns) to 4.4 mils (110 microns) of dry coating for a 95% NVM Plastisol. The thickness of the film depends upon the NVM and rheology of the coating and to some extent on the user technique.

The use of the Damon Variable Film Paint Applicator is similar to the use of regular threaded or wire wound paint applicators except that it can apply any film thickness within a range of approximately 0.7 to 1.5 mils dry film thickness. Thus it can not only replace a significant number of individual paint applicators, but can completely cover the steps between them.

Each end of the Damon Applicator is indexed from 1 to 5. These numbers do not represent film thicknesses and are used only as reference points. With 5 positioned up, the maximum film thickness is produced and with 1 up, the minimum film thickness is produced. The film thickness varies sinusoidally in relation to the index numbers.

An accessory applicator guide is available which attaches to one end of the applicator so that exact film thickness can be duplicated. To coat a panel, the Damon Applicator is placed across the top of the panel with the tongue of the guide following on the flat surface as the applicator is drawn down the panel. A small pool of paint is placed below the applicator on the panel and the applicator pulled down over the surface of the panel being certain that the tongue of the guide remains in contact with the surface to prevent the applicator from turning. Slight variations in film thickness can be achieved by slight adjustments in the position of the guide on the end of the applicator.