... coat: It is mainly used for sandwich panels or industrial inner scaleboard2 Smooth surface panels Flat panels with gel coat: biggest width is ... or the outer panel of refrigerator car.3 Bead surface panels with / without gel coat, the biggest width of 1220mm, ... bead wale on surface, easy to clean.The above mentioned panels can be combined with the froth, gypsum, polywood, aluminiumhoneycomb ,the ...