Tapes and discs...heat resistant tape is a very common masking technique that is often used.  Whether pre-cut to the desired size and shape or purchased by the roll, tapes are a cost effective way to mask most parts.  Caution should be taken in the selection of the adhesive material that the tape is made of.  During the baking process the tape's adhesive may also be baked on leaving an undesirable gummy surface that would require a post cleaning operation.

 Caps and Plugs...are commercially available in a variety of shapes and sizes that will withstand post bake temperatures up to 600 degrees.

Racking system...the design and configuration of the racking system can often serve as a masking device.

Air mask...a low pressure blast of air can remove powder that is electrostatically attracted to the ambient surface.  This process must be accomplished prior to the baking cycle.

Vacuum masking...can be accomplished in much the same manner as the air method described above.  The advantages of this method  are a cleaner process and a sharper break line.

Foil wrap...can hide the surfaces that do not require coating.  This application is desirable on many large surfaces that would be difficult and timely to tape.