How to Clean an Iwata Eclipse HP-CS Airbrush: Cup, Needle, and Nozzle

Step-by-step instructions

Step 1: Empty the color cup before paint dries

Pour excess paint into an appropriate waste container rather than spraying the entire leftover amount into the room. Add compatible cleaner to the cup and wipe accessible residue from its sides. Keep paint and cleaner away from the air-hose connection and trigger recess. Work in a ventilated area with a suitable cleaning pot for the discharge. A pot helps contain spray but does not replace ventilation or the precautions on the paint and cleaner labels.

Step 2: Flush for a color change

With the airbrush connected and pointed safely into the cleaning pot, spray cleaner until the discharge is clear. Repeat with a small fresh amount if color remains, then add the next paint. The HP-CS has a fixed gravity cup: instructions about removing a siphon bottle or a Takumi cup do not apply. Between-color rinsing is useful for wet paint; it should not be mistaken for removal of a dried deposit that continues to disrupt the spray pattern.

Step 3: Disconnect the air supply and clean the needle

For hands-on work, disconnect the airbrush from its air source. Remove the rear handle, loosen the needle chucking nut by hand, and withdraw the needle straight back. Support it over a clean work surface so the tip cannot fall onto the bench. Wipe with cleaner on a soft cloth, moving toward the sharp point rather than into it. A bent needle or split tip is a replacement problem. Do not attempt to straighten it against the nozzle or force it back through the body.

Step 4: Inspect the front end only as deeply as needed

Remove the needle and nozzle caps for access when a normal flush has not cleared buildup. If nozzle removal is necessary, keep the needle safely withdrawn and remove the head cap using the Eclipse instructions and supplied tool only as needed. The HP-CS nozzle seats by compression; it is not the tiny screw-in nozzle used on other Iwata families. Catch it in a parts tray, including if it remains inside the head cap. Do not apply a threaded-nozzle wrench to the nozzle itself.

Step 5: Soften and remove the isolated deposit

Clean the removed nozzle and caps with compatible cleaner and a suitably small soft cleaning tool. Iwata's cleaning guidance distinguishes soaking these removed front-end pieces from immersing the entire airbrush. Never soak or wet-store the assembled body. Avoid forcing a metal probe through the nozzle opening; enlarging or scoring it changes the spray. Keep cleaner out of the air-valve mechanism, and retain the parts in order so a missing cap is noticed before reassembly.

Step 6: Reseat parts gently and use lubricant sparingly

Refit the compression nozzle and head cap without overtightening. Guide the clean needle forward gently until it seats; if it stops abruptly before the normal position, retract it and inspect alignment rather than pushing harder. Tighten the chucking nut finger-tight and replace the handle. When lubrication is needed, use the small amount of proper airbrush lubricant specified by Iwata and wipe away excess. The manual excludes light machine oil and WD-40 because they can interfere with the packing and airflow.

Step 7: Test before returning to the artwork

Reconnect air and test with water when compatible with the paint system. On this dual-action brush, depressing the trigger should supply air; pulling back admits fluid. Unexpected fluid with the trigger only depressed suggests checking needle seating. An uneven pattern, bubbling cup, or persistent sputter may also involve nozzle damage, a loose cap, paint thickness, or pressure. Use the manual's symptom table instead of escalating to stronger solvent. Finish with an empty cup and dry exterior; do not store cleaning liquid in the airbrush.