That Jug is 1/33 scale.
if I remember correctly, the Panel is just 2 (or 3?) layers of cardstock...176 gsm most likely.
(65lb....but I do use 110lb cardstock-200gsm on some projects)
I don't think I used any thicker card there.
Just print two panels...and mount both to another layer if you want more thickness.
Cut the gauge holes in one of the panels.
I have seen some builders sandwich clear plastic between the layers (for the gauge glasss).
...
Canopies are my kryptonite.
I have already documented my experiments with vacuforming.
My issue is always with how to glue plastic to itself, and to the paper model.
I struggle with using CA glues and PVAs just don't work for me.
I struggle even with flat glass panels...often I use double sided adhesive tape.
For a full formed (bubble) style canopy, I usually resort back to the paper canopy and shape it the best I can
unless I must have a clear canopy, then vacuforming is the best way to go.
