Polyurethane 3D Printing Workflow

Would just love to hear of . . .
PU Thermoset resin systems
( with or without chopped glass reinforcements . . . to achieve
1 A very hard stiff high IMPACT RESISTANT parts with upto or exceeding SHORE D 71
2 A FAST SET SPRAY GRADE material to manufacture parts as large as 8ft x 8ft . . . surface area . . could extend on.
3 Whether Rigid PU foam sandwich composite could be integrated simultaneously OR post operatively with this surface ?? ideally simultaneously.

THERE OUGHT TO BE A WAY . . . to accomplish this.

thats very interesting. Do you think this could be used for printing climbing holds?

Will this material work with any 405nm resin printer?

I was super excited when I first saw these new PU materials for Formlabs printers. They seem somewhat better suited for production throughput with that short of a shelf life, not prototyping. I need occasional elastomer small parts, so I'd be trashing most of the bottle almost every instance. Glad to see you're developing new materials in any case, but thats a lot of extra equipment and hassle to accomodate. Hopefully we'll see a more user friendly elastomer resin option for the platform in the future. For now it looks like I'll have to stick with TPU on the ol' Creality FDM :)

A few deal breakers for me: 1. Need a humidity cure chamber. 2.Curing takes "minimum a few days". 3. Shelf life of resin is 7 days to 4 weeks once opened.

So... I think the question a lot of people are wondering, is this suitable for outdoor use? Does the modified curing process increase its resilience to UV exposure post humidity curing? That's the biggest factor when using SLA printed parts as functional parts IMO