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A: They are mostly made of mild steel with a coating of acrylic resin. Please see this link for further information on different metals and finishes.

A: My mild steel lizards are coated with a clear acrylic resin, and yes after serval years they may develop a rustic patina in a moist bathroom environment. If you want to avoid your lizard rusting in time, you should choose stainless steel or zinc or chrome plating.
 

A: A small lizard weigh approx. 800 g. That is i.e. the loo/toilet roll lizard, wiggle tail .