Resistive touchscreen technology works well with almost any stylus-like object, and can also be operated with gloved fingers and bare fingers alike. In some circumstances, this is more desirable than a capacitive touchscreen, which needs a capacitive pointer, such as a bare finger (though some capacitive sensors can detect gloves and some gloves can work with all capacitive screens). A resistive touchscreen operated with a stylus will generally offer greater pointing precision than a capacitive touchscreen operated with a finger.
We tried to use touch screen on a boat many years ago. Everything worked well till it got a wet screen. The above is from Wikapedia.
You maybe better using a styles or corner of a Bank Card if you go down the captive route.
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