Do your resins have UV stabilizers built in, or would this need a protective top coat for long-term outdoor exposure?

Yes, but a protective topcoat would be beneficial.

What's the temperature tolerance range — how does the material handle frost and brittleness in winter versus softening or creep in summer heat?

Depends on the material — we have quite a lot of customers in the automotive sector using DL110H material on parts on the outside of cars, which should have similar environmental requirements.

How does the resin handle water ingress and years of rain cycling — is it fully sealed, or slightly porous?

Sealed. Some resins do absorb water however. You can check the water absorption in the various material datasheets on our website.

What is the nature of any warping or colour change?

Warping is a possibility but very variable depending on geometry — try and keep wall thicknesses consistent on the part. Resins can colour change through time and UV exposure as all plastics do, but you'd need to check specific resins. We keep a sample of most resins outside in our car park for this purpose if you wanted to look at a specific real-world example.

Can it be negated by printing thicker walls?

Uniform walls are normally the best bet — they shrink at the same rate.

The sculpture requires a strong metal core — a vertical steel plate with two supporting poles either side. Do you know anyone local with experience in large-scale permanent outdoor sculptural installations, as opposed to props or prototypes?

No, though there are plenty of local metal fabrication companies around who can help.

How would printed resin sections interface with a steel frame and helical screw pile foundations?

You could glue the resin over the steel peg — epoxy glue is normally good. You could also bolt them on, though spread the load into the plastic using a washer and ideally a compliant element such as a spring washer to account for any contraction of the material.

Could the resin ever play a load-bearing structural role, or should it be treated purely as cosmetic cladding over steel?

Yes, it could be load bearing for light loads. We have printed furniture before — tables, lecterns etc. Check the mechanical properties for mechanical strength for your use case.

What's the maximum build volume and dimensions for a single piece?

Our LC Titan is our largest machine — build volume of 695 × 385 × 1200 mm.

Would larger forms need segmenting and bonding, and if so, how does that affect strength at the joins?

Yes. We frequently do this with a glue joint — it can be made as strong as the original material.

What would lead time and cost look like at this scale?

Referred to the sales team — awaiting response.

At end of life, can the resin be recycled or reprocessed, or does it become landfill?

Currently no, however we are looking at novel reuse methods. A cured photopolymer is a thermoset — chemically crosslinked — so it cannot be melted and reformed like a thermoplastic, and conventional mechanical recycling does not apply. Photocentric is pursuing three routes in response: minimising scrap at the source by packing platforms densely and returning uncured resin to the vat; energy recovery, since photopolymers have a high calorific value and combust cleanly in energy-from-waste facilities; and designing in recyclability from the outset, developing chemistries with cleavable bonds that could let a cured network be broken back down into reusable oligomers.

Do you offer a plant-based resin (DL902?) suitable for large-scale outdoor structural use, and how does its durability compare? Does an "eco" resin make much difference to the immediate environment once installed outdoors?

DL902 should be a good choice — it's one of our best performance materials regardless of being plant based. We also offer DL240 Rigid plant-based resin, though it's a harder material. No material should leach anything out, so it shouldn't have an impact on the environment once installed outdoors — we have materials tested in food and drink packaging applications where leaching is not allowed.

Random idea — is there anything that can be done with surface texture or finish to encourage moss, lichen, or fungal growth over time, or would that compromise the material's integrity?

Yes, surface texture is easy to apply, and we do it on most of our parts. You can apply custom textures in Blender easily, or BumpMesh by CNC Kitchen is a good free tool for testing. It would be easy to test different textures to see what grows well, though it could be worth trying to imitate an existing stone texture or similar. It may not hold enough water to be a growth medium — but maybe that could all be done with texture.