A:its not water proof but yes its smutch proof.the big advantage is that it glides on very easily.the application of it is very simple.but as far as its look is concerned it doesn't look shining .
Paresh Duseja
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Q:how to sharpen
A:using a ordinary pencil sharpener.
Sumita Majumdar
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Q:The tip can be sharped ??
A:It is retractable. Doesn't need sharpening. That is actually the best part as it leads to no wastage of the product.