Is There A Paint Or Filling That Is Best Compatible With The Plastic? Or Metal Or

Discussion in '3D Design Requests' started by vjmaury, Oct 25, 2016.

  1. vjmaury
    vjmaury Member
    I want to engrave a 3d plaque then paint in or fill in the empty space so it's higher contrast.

    Is there a paint or substance that is very compatible with the plastic or other ?

    Is the plastic itself available as a liquid?

    Please excuse my newbyness.
  2. mkroeker
    mkroeker Well-Known Member
    You can use acrylic paints for the plastics, and automobile paints, modeling clay or selective tarnishing for the metals.
    I do not think there is a practical "liquid" version of the plastics - you could experiment with hot glue or UV-curing adhesive but I assume it would be rather messy.
  3. GrumpyAlison
    GrumpyAlison Well-Known Member
    Acrylic does work really well on plastic.

    Alcohol ink is very effective at coloring the strong & flexible because it's porous, but it's impossible to control where it goes, so I'd only do that if you're trying to cover the whole thing.

    I've also used acrylic to antique steel (see attached) and it hasn't worn off yet. Even if it did, I have so much acrylic laying around I'd probably just repaint (takes like... 5 minutes) and do a different color :p AceRing_Henna_Stainless + PurplePaint.JPG

    As far as liquid stuff, You could try different types of resin, but that would probably be a nightmare in terms of mess. It can also get a bit pricey.

    I know they also make stuff designed to coat 3d prints and get rid of the grooves, but I believe that's pretty viscous. Don't know if that would color well either...

    Good luck!
    Silvergence_Karen likes this.
  4. 05Sultan
    05Sultan New Member
    From my experience, with metal or 'plastic', clean and rinse with dish soap and water.(plastics mainly). For metals that are smooth or rough textured surfaces, first soak in vinegar for a few minutes and then rinse in clean water. The vinegar is a weak acid that microscopically etches the surface, plastic or metal. Prime the surface with an enamel aerosol primer of either white, gray, or black. Now you can use any paint media you wish. Best to use enamels or lacquers first for base colors as they are tough and can tolerate the 'working in' of subsequent color media. After base color is dry, use any media, acrylic inks, water colors, enamel, lacquer and apply detail colors you wish to be prominent to the eye when finished. when this is dry, seal coat with either gloss or matt clear enamel or lacquer. Now apply filters or washes for special effects you wish to have to either 'age' or 'gem' the detail. When this dries, seal with gloss or matt clear enamel or lacquer for toughness and wear. Practice,practice, practice, until you get to know the media. Primers are good to go after 20 minutes of dry time as a general rule. Humidity and temp affects all color medias from primers to inks( either alcohol or acrylic). Lacquers and oils take about 7 days to mature after application. Enamels about 3-5 days, and acrylics and inks 1-3 days. Again, process test pieces as you go along to determine when the next step is good to go. Be Brave, smart, and confident.
    Note: it's good practice to let each wash or filter dry before sealing and applying the next wash or filter.
    Methods of application are entirely up to you. Experiment to your satisfaction.
    Have fun always. ;)
  5. vjmaury
    vjmaury Member
  6. vjmaury
    vjmaury Member
    Is there a filler like when an engraver cuts the letters, then fills the indent? The result is a flat surface with two colors.
  7. mkroeker
    mkroeker Well-Known Member
  8. 05Sultan
    05Sultan New Member
    If you have an existing firm doing the engraving, then you should ask them straight off. The answer depends a lot on the types of plastic used for the engraved part and what is compatible to use as the filler and color agents.
  9. Silvergence_Karen
    Silvergence_Karen Active Member
    Very nice effect for antiquing just the way I like, I have to try it on some stainless pendants & rings. Did you do any 'soap & water cleaning' or vinegar soaking before using the acrylic on stainless? Thanks for the tip!