LEARN TO RECYCLE ♻ polystyrene trays and packaging (Telgopor, Unicel, Plumavit, Tecnopor, porexpan, porospan, white cork, etc.) to create a varnish to protect wood, cardboard, paper and other surfaces.
If you are looking for ways to protect wood, here is another one based on recycled cooking oil ♻ that may interest you 👉    • Protector ecológico para madera con a...  

Purchase links:
- Solvent for polyurethane: https://amzn.to/33nc3BZ

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Homemade varnish - Homemade varnish for paper - Homemade varnish for cardboard - Homemade varnish for wood