Hello guys

Need your advise what mainly materials used for widebodykits?
Any advise on weight and strenght what to use?

Also for interior stuff also making molds
what can suggest i used 2 layer 450 but i do not liked, maybe 2x380 and in middle like some kind or core? Advise please. So that weight not a lot but good strenght and if i use my old method corners crack each time piece not so elastic.