Filling fiberglass with epoxy resin is a key process in boat building, automotive repairs, and DIY projects. Begin by preparing the surface: sand any rough spots and clean the area to remove dust and grease. Mix the epoxy resin according to manufacturer instructions, ensuring an accurate ratio for optimal strength and adhesion. Apply the mixed resin into the fiberglass, using a brush or roller for even coverage. For deep fills or repairs, consider using a filler material like chopped fiberglass or microspheres mixed with the epoxy to create a thicker, sandable paste. Allow the resin to cure as per the specified time, which can vary depending on temperature and the epoxy formula. Sand the cured epoxy to smooth out the finish, preparing it for any paint or gelcoat, if necessary. This approach provides a water-resistant, durable repair that integrates well with existing fiberglass structures.

Polyethylene is a common type of plastic used in a multitude of products, including some food packaging. In general, it is not recommended to microwave polyethylene because it can melt or warp at the temperatures generated in a microwave, which could potentially lead to chemicals leaching into the food. However, some polyethylene containers are specifically designed and labeled as microwave-safe. These have undergone testing to confirm they can withstand microwave temperatures without melting and without leaching harmful chemicals into food. Before microwaving polyethylene, always look for the microwave-safe label or symbol. If in doubt, it's safer to transfer your food to a container that you know is safe for microwave use.

Dyeing a puffer jacket black requires careful preparation and consideration of the jacket's materials. Firstly, check the care label to confirm it can be safely dyed. If the jacket is made of synthetic fibers like polyester, a dye specifically formulated for synthetics is essential; for natural fibers, a standard fabric dye will work. Pre-wash the jacket to remove any impurities. Fill a large pot with enough water for the jacket to move freely, mix in the dye, and maintain a constant simmer. Stir regularly to ensure even coloring, for about 30 minutes to an hour, depending on the desired shade. Rinse the jacket in cool water until the water runs clear, then wash it separately in cold water and let it air dry. Note that zippers and stitching may not dye as well as the fabric. Always wear gloves and protect surfaces to avoid staining.