2,Play primer and bottom sealing processing
Been painted things are required to play primer and bottom sealing processing against has ooze is lubricious,permeability pollution really stone paint,primer dosage every times in 0.15 KG/to ㎡ side until completely without permeability color so far.
3:lofting reticule
The black line already exert good,first with straightedge or marking make linear markings.
4:stick adhesive tape line
Stick adhesive tape to stick straight and paste,and double-quick passage,can nail uplines nail.Lest spraying after could not find a tape source