Generally I don't bother with guidlines for a section, but I'd like to make this area one where people can quickly fnd what they are looking for.
In your post title, please specify Vinyl, Resin, Plushie, etc... since some processes will apply to one or the other but not always all.
If you discuss a specific product, try to include a link to the manufacturers website so folks can go to read more if they like.
depending on how this area works out I may or may not have other guidelines, these are it for now