i need to wind a transformer with very thick magnet wires (for a spot welder). the thick copper wires, i already have, but i still need to insulate it. i don't want to spent a lot of cash with polyimide or polyester coatings, nor do i have the equipment and expertise to apply them properly. so i'm going with polyurethane varnish as coating. but varnishes are not specialized for being flexible, electrically insulating and heat resistant. is there anything i can add to it to make it so?? maybe dissolving polystyrene into it?? how about sulfur?? anything, any cheap way to go.
P.S. i am not up to anything dangerous. i just need to make a cheap spot welder.
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