Links to items mentioned in this video. (Note: I am NOT endorsing any particular product(s), nor am I compensated by or connected to any of the companies mentioned.) I do NOT guarantee that these links will give you the best available price! Consider these links to be a starting point for your search.
Miskit Liquid Friskit: https://www.amazon.com/Grumbacher-Miskit-Liquid-Frisket-35ml/dp/B0027AAPBK/ref=pd_ci_mcx_mh_mcx_views_0?pd_rd_w=TcvAU&content-id=amzn1.sym.352fa4e9-2aa8-47c3-b5ac-8a90ddbece20%3Aamzn1.symc.40e6a10e-cbc4-4fa5-81e3-4435ff64d03b&pf_rd_p=352fa4e9-2aa8-47c3-b5ac-8a90ddbece20&pf_rd_r=1267P900H3TSVBQT6HAB&pd_rd_wg=4ymB4&pd_rd_r=7eac7ba4-a904-47e8-a725-55080078a899&pd_rd_i=B0027AAPBK
Decal paper is available from a number of suppliers. It generally comes in either clear film or white film, and it is usually specific to either inkjet printers or laser printers. Here is a link to start your search: https://www.amazon.com/decal-paper/s?k=decal+paper
I have used paper from Micro Mark and gotten good results: https://micromark.com/pages/rapid-search-results?q=decal+paper
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This video was edited using Shotcut for Linux. Video footage and still images were recorded using a Galaxy A10e phone and a Nikon D7100 camera.