Some stupid question …
So, I built this DIY 3D printed enclosure.
After gluing, connecting and sanding it … I came to spray it with a primer, and I get these bubbles, waves, non smooth surface.
Any tips of how to coat/spray correctly to get a smooth surface ?
How can I fix this already non even surface I’ve created ?
I’m planning to spray it using black color on top of this primer coating at the end.
Spray very light coats your first time around and let it dry. I would even lightly sand a 3d print to get the paint to stick better if I was starting from scratch.
You will 100% need to sand those waves off unfortunately.
Looks like some layer lines aren’t filled in all the way. Maybe invest in a putty filler too.
What was the weather like? Humidity and temperature has a huge effect on spray paint application. Also the coats look kinda thick, you’ll want to do several thin coats rather than one thick coat.
I did fill it with a filler, I attachd a picture now. So, what will be my next step ? sand them and then respray ? should I look for a thiner spray or just use this one softly ?
Sand and respray in very light coats in a sweeping motion. Never hold down on the can and just go back and forth. It should be a feathering spray from side to side almost like brush strokes, barely overlapping the tail of the last spray.
Primer/filler on such noticeable layer lines aren’t gonna do you much good unfortunately. try to find an orbital sander, it’ll help big time. (Don’t sand a spot for too long or it might deform😉)
It’s seems like it’s too late now but use epoxy primer next time. It has extremely good characteristics to fill and sticks to metals and plastics. it’s quite expensive compared to normal primer and once it’s mixed, it’s over.
IMO
