You must spray the part with a uniform, light coat. The thinner the coating, the better. Adding more than a thin coat of developer can impact a part's thickness when scanning. Developer comes off easily and is prone to fingerprints. Mounting an object to a surface (such as a bolt through the center of a threaded section) can provide a hand-hold for moving the part after spraying. You can also spray a portion of the part (leaving a section as a hand-hold), complete the first scan, clean the part, respray the area used as a hand-hold, and then rescan as needed. The following steps are a general procedure for applying developer to a part.
- Apply targets before spraying. Otherwise, the targets will slip off the white part.
- If necessary, mount the part or decide which section to use as a hand-hold.
- Hold the can 12 to 18 inches from the part and spray a light first coat.
- Set the object aside to dry for a few minutes.
- Re-spray any areas that need it.
- Clean any targets with a cotton swab prior to scanning if necessary.