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Painting PLA

Any recommendations for the best primer / paint ?

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Alan Wood 426/02/2017 09:08:58
257 forum posts
14 photos

I have just bought a single filament machine (Sindoh 3DWOX) and I am delighted with it. I use Fusion 360 to create the designs.

Being a single filament machine I would like to paint sections of the finished parts. Has anyone any experience of the best painting technique to ensure the paint stays put ? I guess it needs something that etches into the plastic?

Neil Wyatt26/02/2017 11:19:32
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19226 forum posts
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86 articles

Hi Alan,

Bear in mind that the finish is fresh and therefore very clean so it's ideal for painting without any prep. No nasty mould release agents to get rid of.

I've found that acrylic and humbrol enamel type paints both adhere well to PLA.

I've also tried high build primer which does a reasonable job of helping disguise the lines on a fine print.

Neil

jason udall26/02/2017 22:13:22
2032 forum posts
41 photos
Pva glue works as primer for me..
Neil Wyatt27/02/2017 07:47:43
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19226 forum posts
749 photos
86 articles

MakerBot recommend using acrylic paint as primer - mind acylic paint is basically waterproof PVA with colour in it...

JasonB27/02/2017 08:02:43
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25215 forum posts
3105 photos
1 articles

I've not tried it but would have thought one of the spray cans of primer made for car bumpers & trim would do the job.

I use acrylic primer on the model figures which are various plastics and resins and that sticks well but depends on what use the parts are going to get. If just for display then so long as it sticks then thats OK but if the part will get handled or be subject to load, steam, heat you may want a better bond.

Alan Wood 427/02/2017 11:03:11
257 forum posts
14 photos

Thanks all. Will experiment.

I hadn't really thought of PVA, nice idea.

Alan

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