I’m new to ultrasonic cleaning - do any of you have tried-and-true, polymer-safe recipes for handguns? I’d like to think I can clean the bore as usual, scrub the action, dry them out with a cheapo hair dryer, and then immerse them. I use Palmolive “Ultra” sparingly for dishes, but I wonder if a diluted Dawn solution could also work well. In the past, I’ve used acetone to clean metal, but what about 91%, injection-quality isopropyl alcohol in a pinch? Firearms are precision-made machinery, and I like to keep them squeaky-clean.
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You should be good with any diluted water soluable cleaner. Simple Green and Dawn are frequently used. You can also check Brownells for commercial offerings.
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As a former aircraft engine component inspector, I’ll vouch for that isopropyl as a squeaky clean cleaner. I used it to remove machine oil and coolant mainly, but judging by the wipes, it was pulling unseen dirt off the parts as well.
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I have simple green that I use!
I’ve had good results using large ultrasonic cleaners with a mix of hot water, a little dish soap, and a splash of white vinegar. I steer clear of ammonia-based stuff for anything with aluminum. Let it run for 10–15 minutes, rinse, and dry right after. Makes a big difference on parts that are hard to get by hand.
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People often believe a stronger alcohol will work better for cleaning, but 70% IPA actually works better. (Water is the universal solvent, and allows a diluted alcohol of 70% to penetrate better. Water also allows alcohol to remain in contact longer by slowing evaporation. This is why 70% IPA is also better for disinfecting wounds.)
Welcome to the forums Yozi!