What you need to know BEFORE YOU BUY: Buyer beware... Polymer and injected ABS parts are manufactured with a mold release agent built into them, which means that traditional bodywork fillers and paint do not adhere to them properly. This can lead to thousands of dollars in paint and bodywork down the drain. When damaged, they are more likely to shatter or tear instead of denting. This non-repairable nature of polyurethane parts makes them disposable and forces replacement purchases.
Additionally, many after market parts manufacturers add a second chemical to their resin to make it more flexible. Over several years, the chemical causes substantial warping an dimpling in the parts. Exposure to sun and elements only worsens the condition. Additionally, any paint and repair of such parts is much more difficult due to their composition of various chemicals, which can seriously affect secondary bonding.