Artist/3-D Novice needs advice

#1

I’m an artist who wants to create some fairly large models, in the range of 6 to 10’’ to 12’’ tall that I could put in an outdoor installation on the ground/dirt/moss in a wooded area of a public park.

So it needs to be a material that can print in a printer handling that size, in a durable material that would either be colored materials in the color range shown on the attached image, or I’m wondering if I could spray or hand paint a particular material. And could the material handle the application of an automotive paint finish without disintegrating? Do you have a glow in the dark material?

I’m looking for a matte finish initially and I’m thinking that the sandy-surfaced materials could work. I’m also curious about resins. In a perfect world I could do the kind of intense colors/fluorescent/crystal clear but tinted/glow in the dark layered stripings in the kind of format as shown below, in a variety of shapes/colors/color band widths, etc.
The
And I need some advice on rendering programs. The thing below a
Was done on Gravity Sketch, a beta version that they are now working with Apple on (or so the told me) that I find very user friendly for old folks who don’t know a lot like me. Thanks for your help!

#2

image

See, I could even get the image to attach to the message. Such a number, Sue

#3

That was “such a nube’’

#4

image
You see, I’m really a painter

#5

And I just started fooling around with digital drawing/painting apps:

#6

For outdoor applications I’d stick with SLS Nylon over any of the other materials. You can print large for a relatively inexpensive price and it can definitely handle pretty much any paint you can throw at it - including glow in the dark paint.

Alternatively you could find someone local and have them print your design in PLA or ABS (many local libraries have decent FDM 3D printers that could probably handle this job if the pieces were split then glued). You could even print using glow in the dark filament. There’s a lot of different paths you could take. Good luck on your project!