Hi everyone
I want to strip paint off a pile of small items in a dishwasher. It'll be a mix of emulsion and oil based gloss. Before trying it, what chemicals would be likely to work? And what would and wouldnt kill a dishwasher?
thanks, NT
SWMBO will be likely to kill you if she finds out :-)
I think you should be asking what would and wouldnt kill an NT, if SWMBO finds out
Soften the gloss paint by putting the items in the tumble dryer for a while first.
Owain
Sodium hydroxide.
Sodium hydroxide will definitely kill it, but it takes a few months. It will rot every plastic component in the dishwasher.
Anywhoo you dpn't need the dishwasher, just dip the items into a suitably strong sodium hydroxide solution.
If you don't know what you're doing, and you clearly don't, then you will end up rolling on the floor screaming "my eyes, my eyes" as the caustic soda melts your flesh.
Sodium hydroxide doesn't attack plastics. That's why it's packaged in plastic. It also doesn't dissolve emulsion paint or other water based coatings.
Depending how small this pile of small items is (and what they're made of), it might be better simmering them (very) gently on the hob in an old (not aluminium) saucepan, because as soon as the solution cools, it virtually stops working
then you
Bit melodramatic perhaps?
What I dont know is whether it attacks rubber hoses & seals.
I'll have to try it. I wondered if the heat and water alone might redissolve the pva, or weaken it enough to fall off.
There are thermoplastic, copper and steel. And just too many of them to go over each one by hand.
daft too, been using caustic for years. But not to strip emulsion.
thanks for the suggestion, looks like I need to find out more about caustic and rubber first.
NT
lol.
NT
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Depending on the size of the pile of bits you might find this a bit cheaper than a new dish washer:
Cic.
With eye protection, I take it?
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Thanks, I'll look into that more.
NT
No, it doesn't attack *some* plastics. It rots others rather quickly.
Not all plastics are the same.
Again not entirely true.
Think I'd be tempted to just bung 'em through with normal dishwasher stuff, possibly on one of the hotter cycles. I clean small parts that have got emulsion on them by covering them in ordinary washing up liquid and sploshing enough boiling water over to cover 'em. Leave until cool, agaitating occasionally and the emulsion most just falls off. Splashes of gloss as well.
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