A poly-cap is a type of plastic cap often used in model-making kits, especially for assembling figurines or model...
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What is a poly-cap?Read more -
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What kind of solder should I use on white metal kits?
If you are soldering a white-metal kit together, you will need to use a lower temperature setting on your soldering iron (or a low voltage iron) to avoid damage to the metal. A standard 25W iron will be way too hot and will melt the kit itself if you touch it. Obviously, if your hand is steady enough you can take a chance but this is very risky.
A lower temperature setting will also require a special solder with a low melting point.
Low melt solder sticks are available from most good model shops and have a melting temperature as low as 70 degrees Celsius (about 160 degrees Fahrenheit). This kind of solder will likely require a liquid flux (an agent to help the solder flow) for good adhesion to the model.
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