Hugues, the advantage of a poly jet printer over a SLA printer is that poly jet can put down multiple materials in the same print and make watertight hollow objects (aka infill). SLA has to make objects either hollow and open or solid. Even a polyjet as rudamentary as this one can be made with multiple deposition nozzles, allowing solid parts with durable live joints, among other things.

(I missed that part about the laser curing in the article.) Basically, what he needs is uncured resin mixed with partially cured resin mixed in to give it some thickness (also to cure faster as it's depositing). Instead he seems to be trying to go for the sprayed-on method that the more expensive printers use, and it's not going to work nearly as well.