Shenzhen Alu Rapid Prototype Precision Co., Ltd.

Yes, we can absolutely spray paint 3D prints, and it’s one of the most popular and effective ways to finish them. Almost all common 3D printing filaments (PLA, ABS, PETG, ASA, etc.) take spray paint very well if you prep the surface properly.

Best Practices for Great Results

1.Sanding / Smoothing  

a.Start with 200–400 grit sandpaper to remove layer lines.  

b.For an ultra-smooth finish, wet-sand progressively up to 1000–2000 grit or use filler primer (see below).  

c.PLA can also be chemically smoothed with ethyl acetate or limonene vapor (for ABS/ASA), but this is optional.

2.Primer is Your Friend  

a.Use a high-build filler primer (e.g., Rust-Oleum Automotive Filler Primer, Krylon Fusion for Plastic, or Tamiya Surface Primer).  

b.2–4 light coats, sanding lightly with 400–600 grit between coats, will hide virtually all layer lines.  

c.Plastic-specific primers (Krylon Fusion, Rust-Oleum Specialty Plastic Primer) have excellent adhesion even without sanding.

3.Best Spray Paints  

a.Automotive-grade paints (Dupli-Color, Rust-Oleum 2X, Montana Gold, Tamiya TS/PS series) give the most durable, glossy results.  

b.Regular craft acrylic sprays (Krylon, Rust-Oleum Painter’s Touch) work fine for decorative pieces.  

c.Enamel > acrylic lacquer for durability on functional parts.

4.Technique Tips  

a.Light, misty coats (30–50 cm away) — never heavy wet coats or you’ll get runs.  

b.10–15 minutes between coats, 24 hours full cure before clear coat or handling.  

c.Paint in 50–70 % humidity and >15 °C (60 °F) for best results.

5.Clear Coat (Highly Recommended)  

a.A 2K (two-part) automotive clear coat gives insane durability and depth.  

b.1K clear coats (spray can) like Rust-Oleum Automotive Clear or VHT work great too.