I have used the Anycubic Plant-based for most of it and found there was no warping of the 40' cars. The 53' cars needed some brass sills to keep them stable, but the walls were a bit thinner so that might be part of the issue. I would use this resin again, but honestly did not find the smell less offensive than conventional resin. Every print worked fine, no failures.
I am now using Anycubic water-wash resin and don't like it. It prints fine but is quite brittle compared to the others. The cars above are printed with the water-wash resin and there has been no warping. I had to reprint a few of the end cars because I broke off the brake wheel stand removing the supports.
I don't know how this varies from other protocols, but I leave the prints on supports for a few days after curing. I also minimize the time in alcohol to rinse. A few good shakes in each of a dirty and clean alcohol bath gets the prints nice and clean. Soaking resin in solvents for a long time was a big no-no with all the things I did in the lab. Especially if the solvent has some water in it as they pretty much all do.
Added note: The Anycubic water-wash resin is very low viscosity, which is good if you are printing in cool conditions. We had a deep freeze last week and I had some weird artefacts with more viscous resins like the Plant based and ABS like. The water-wash worked at temps of 14-18 degrees C no problem at all. So maybe it has a niche use if you can't always keep the print space ideal temperatures.
