maybe a hot water soak, but after salt crystalizes it takes more than just cold or mild warm water to break it down. this is why it is really pointless to flush your boat motor after it has cooled down. Jeff may have allready fixed problem when he adjusted tollerances towards outside portion of delrin muzzle. only real way to keep salt out is to use some sort or sealer/grease, especially on a porous material like delrin.
ALSO: the portion of the delrin which spike is installed is the most porous part of the stock which was used. its called centerline porosity and its a huge problem with some polymer acetals like delrin
ALSO: Clears are more porous than blacks because the fillers used to dye the material bond to the polymers filling voids during the cooling process.