TIP: sand the pipes on the runners and get rid on the production join lines on each pipe.. I know the on other kit bash parts you leave them as the studio model has them but not the plpes which were bent copper I believe. Also keep the undersides of the pipes dark to stand out like on the left here...It's just my way and a know many may prefer to just do it all when stuck together! Up to you...no set rules on this. So I've sanded with fine paper, painted oil black & left to dry 3-5 hours should do then sanded again to create weathered pipes but leaving the undersides dark. One that's done l can cut from runners & sand them bits.