Keep resin parts out of direct sunlight. Detailing and structural supports remain in order to protect the parts in transit, and should be removed before painting.
Parts will benefit from a wash in cool soapy water before painting, but do not leave them to soak. Alternative, Isopropyl alcohol is also a good cleaning solution if parts feel overly sticky.
If any components appear bent or warped, heat them gently with a hairdryer or in warm water (do not soak), and then hold parts whilst they cool.
If modifying the parts in any way (either by cutting, filing, sanding or drilling) be sure to wear appropriate protective clothing such as gloves and masks.