What is the best post-processing for 3D resin prints?
If you’re making the most of the low-cost and high-strength material, you’ll want to follow a few simple steps to enhance your prints, whether you’ve used a DIY or pre-built resin printer.
Post-processing is crucial for finishing any 3D print, whether it’s made using one of the best 3D printers or cheap filament options. While some technologies are more forgiving than others, almost every model will benefit from a little bit of TLC – from removing rough textures to adding layers. Here’s everything you need to know about post-processing your 3D resin prints.
How to clean and cure 3D resin prints
Curing resin prints involves removing uncured resin from the surface using a brush, then washing the model in isopropyl alcohol (IPA) or other solvent to remove any uncured resin.
When it comes to 3D FDM prints, curing typically involves applying heat using an infrared lamp or other device, and removing any support structures using wire cutters. Support removal is more important for FDM prints as they can create bumps in your models, but it’s also important when using resin as the supports can be difficult to remove.
Cleaning 3D resin prints is the most important post-processing step as uncured resin can cause the resin to become cloudy, and even stick to your print bed. If you’re having trouble removing uncured resin from your print, check out our dedicated tutorial on cleaning and curing resin prints.
How to sand resin prints
Sanding resin prints is crucial for removing any rough textures or filling gaps between layers. We recommend using sandpapers with different textures to mimic different grades of sandpaper, from coarse to fine.
If you’re looking to smooth rough surfaces, we recommend sanding your model until it’s smooth to the touch. You can also use sandpapers with a polishing compound to create a mirror-like finish.
How to remove support material
Support removal is important when printing with resin, as the supports can be difficult to remove and can cause bumps in your model.
We recommend using a pair of wire cutters to remove support materials, but it’s best to be gentle as you don’t want to damage the print. If you’re struggling to remove supports, try using a hobby knife to cut them away.
How to fill gaps
Filling gaps between layers and removing support materials leaves your 3D print with gaps that need filling. We recommend using epoxy putty to fill gaps, as it’s easy to apply and creates a seamless bond. You can also use epoxy putty to join parts together, such as when creating multi-part models.
If you’re looking for a quick fix, you can also use a hot glue gun to fill small gaps, or superglue for smaller areas.
How to prime resin prints
Priming resin prints before painting creates a smooth surface and helps fill tiny holes within the model. When using resin, we recommend using a clear resin to prime your model, but you can also use polyurethane to provide extra protection and enhance the appearance of your print.
How to paint resin prints
Painting resin prints is essential if you want to create a smooth surface and fill tiny holes, but you’ll also be able to make your designs more colourful using a range of paint types.
To prime your resin print, we recommend using a clear resin to create a smooth surface. You can then use acrylic paint and a range of other liquids such as inks, wax, and even alcohol to create your finished design. You can also use an airbrush to apply paint with fine detail.
How to coat resin prints
Adding a coating to resin prints can provide protection and enhance the appearance, but you need to be careful when applying additional layers as you don’t want to damage your print. For example, you can apply resin to the top layer of your print to add a glossy shine, but you’ll need to be patient as it can take several hours to cure. You can also use a spray can or brush to apply clear varnish or polyurethane to enhance your print.
The best resin prints
For the best resin prints, you’ll want to clean your model using IPA, remove any uncured resin, and fill any gaps using epoxy putty. We also recommend priming your model before painting using a clear resin, and adding a layer of clear varnish or polyurethane for added protection.
