Kristi Kai Cosplay shared this video showing how to mould Worbla over pre-existing shapes.
Nimbus Cosplay shared this method of using both the folding and sandwich method together for a smooth application without air bubbles and less Worbla used.
Bambi Cosplay shows the basics of the Sandwich Method for working with Worbla in this video.
The Sandwich Method is one of the most common ways of working with Worbla to add strength and thickness. This writeup explains the basic process of how the Sandwich Method is used.
Air bubbles form when Worbla is layered, on its own or with EVA foam, and air is trapped between layers. Tiff shares a method here for removing them before painting.
How (and why) to use the folding method instead of the sandwich method when building with Worbla and EVA foam.
A collection of videos sharing different methods for patterning armor and accessories
These videos are some of the first that were created to talk about Worbla, while they’re older they still have a lot of information regarding the basics, so if you’re looking for a starting point check these out.