slusher Posted February 21, 2023 Share Posted February 21, 2023 I am new to using 3D parts. What’s the best way to clean them before paint? Is ename safe to use on them? Quote Link to comment Share on other sites More sharing options...
Fat Brian Posted February 21, 2023 Share Posted February 21, 2023 They should need cleaned unless they feel sticky, I've gotten a few things from ebay that were. That's uncured resin and comes off with isopropyl alcohol. Quote Link to comment Share on other sites More sharing options...
iamsuperdan Posted February 21, 2023 Share Posted February 21, 2023 As Brian said, Isopropyl alcohol will work to clean resin parts. There's also a water washable resin, which is what I use, and it can be rinsed with warm water. After curing, I'll usually give it a rinse with warm water and dish soap, and a good scrub with a toothbrush. Seems to do the trick. 1 Quote Link to comment Share on other sites More sharing options...
Oldriginal86 Posted February 22, 2023 Share Posted February 22, 2023 I have just scrubbed them in warm water and dish soap before priming. I’ve used enamel and acrylic paints on them. The only difference between resin and plastic is the use of CA glue. Quote Link to comment Share on other sites More sharing options...
Shark Posted February 22, 2023 Share Posted February 22, 2023 1 hour ago, Oldriginal86 said: The only difference between resin and plastic is the use of CA glue. I am new to 3D printed parts also, having just bought a set of wheels. What effect does super glue have on them? Quote Link to comment Share on other sites More sharing options...
MeatMan Posted February 22, 2023 Share Posted February 22, 2023 18 minutes ago, Shark said: I am new to 3D printed parts also, having just bought a set of wheels. What effect does super glue have on them? No different than anything else. Works fine. Quote Link to comment Share on other sites More sharing options...
Fat Brian Posted February 22, 2023 Share Posted February 22, 2023 1 hour ago, Shark said: I am new to 3D printed parts also, having just bought a set of wheels. What effect does super glue have on them? Typical solvent glues that work for plastic don't work for 3d printed or resin parts. The need super glue or epoxy. Quote Link to comment Share on other sites More sharing options...
my66s55 Posted February 22, 2023 Share Posted February 22, 2023 The best way I've found to do 3d printed parts is to take a piece of masking tape and stick it to the part. If it sticks, its ready to paint. If the part won't stick to the tape, soak it about 5 minutes i IPA. Just because it's not sticky doesn't mean its ready to paint. Quote Link to comment Share on other sites More sharing options...
Oldriginal86 Posted February 22, 2023 Share Posted February 22, 2023 I haven’t tried epoxy yet but I’m guessing it would offer a longer working time and the “hold” would be much stronger. Quote Link to comment Share on other sites More sharing options...
Bainford Posted February 22, 2023 Share Posted February 22, 2023 1 hour ago, Oldriginal86 said: I haven’t tried epoxy yet but I’m guessing it would offer a longer working time and the “hold” would be much stronger. Yes, epoxy has a longer working time, and can be very strong. The longer the working time, the stronger the hold; e.g. 30 minute epoxy is stronger than 5 minute epoxy. However, CA can also be very strong, and there are CA glues out there with longer working times also. One advantage of CA is the variety of viscosities available, from extra thin with the consistency of paint thinner, to gap filling CA with a gel consistency. Generally speaking, the thicker the CA, the longer working time. A nice advantage of thin CA is its ability to wick into joint lines. Another advantage of CA the option to use a 'kicker' or accelerator, which when applied to any CA, will cause it to set up instantly. The drawbacks to CA are its tendency to be a bit messy and unknowingly make its way onto your fingers, where it will instantly weld itself to the next thing you touch. CA glue can also 'fog' or 'frost' clear and chrome parts, but there is a fog-free CA available, too, which is good for those parts. Epoxy and CA are both excellent choices, and there will be situations where one will be preferable to the other. I use extra thin CA for almost all of my multi-media gluing, though most CA users employ a medium or thick CA. The well equipped model bench will contain numerous adhesives for various purposes. YMMV Quote Link to comment Share on other sites More sharing options...
slusher Posted February 22, 2023 Author Share Posted February 22, 2023 13 hours ago, Oldriginal86 said: I have just scrubbed them in warm water and dish soap before priming. I’ve used enamel and acrylic paints on them. The only difference between resin and plastic is the use of CA glue. is it safe to use Tamiya fine white primer before painting with enamel? I primer every thing.. Quote Link to comment Share on other sites More sharing options...
Jiml0001 Posted February 22, 2023 Share Posted February 22, 2023 If the 3D part is sticky then it wasn’t completely cured. Put the part in strong sunlight for a couple of hours. Turn it over and do it again. The resin should harden up. If you have one of those lights that are used to harden fingernail polish then use that. A few minutes under the light should harden it up. Fully cured resin should be hard and dry like styrene. I haven’t had any paint issues on parts I cure in UV light. I mostly use Tamiya and Vallejo paint and it comes out fine. Quote Link to comment Share on other sites More sharing options...
NOBLNG Posted February 22, 2023 Share Posted February 22, 2023 3 hours ago, slusher said: is it safe to use Tamiya fine white primer before painting with enamel? I primer every thing.. The primer is safe to use under enamel. Any glue that is used on painted parts is only as strong as the paint bond is. I have started putting tiny score marks with the tip of a sharp #11 blade on the mating surfaces before using CA. Especially on very tiny parts that I can’t pin. I think it gives the glue something to hang onto. Quote Link to comment Share on other sites More sharing options...
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