Soaking the parts will help, but ultimately you'll need to carefully remove the needle from it's housing to clean the actual needle and spring. It's amazing how much paint remains, even after copious amounts of clean thinner etc, are blown through the brush.
Give the small tube that the needle fits in a good clean with a pipecleaner or such too.
To save money I use an inexpensive car screen wash to clean the brush out - it's less harmful to the plastic parts and any rubber o-rings or seals.
cheers Ju
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Joo's Paint Kingmax Servos Optipower Yokomo
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