... parts: made in the imported LLDPE with automatic rotate plastic machine,anti-UV,anti-static,anti-crack2.Metal parts: ... and smooth 3.Deck: use the automatic punching machine,skid-proof,water-proof 4.Painting: use the ... painting flow line machine,well-mixed 5.Certifications: pass the TUV EN1176, ... if there has air trail ,crack,bubble and so on.7. Check if there is some crack or ...