How to Create and Upgrade Rajang Weapons/Armour (costs, how to get materials, etc)

To upgrade the weapons, you're missing tempered glimmerpelts, from tempered Rajang in the guiding lands. Now please stop asking me lmao x_x

Don't forget, I have a spreadsheet which collects all sorts of data on MHW Iceborne that people ask about a lot - things like the materials needed to upgrade the best charms (e.g. handicraft, expert etc), a list of all the guiding land monster drops and gathering nodes (plus it's searchable), what materials you need for every possible augment (attack, affinity, defence, health, slot, element/status) in the game, etc:
docs.google.com/spreadsheets/d/1gAWRSi7OAkJAM4d…
Feel free to point people to this doc if you think they would find the information useful :D

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