1, with an angle grinder equipped with abrasive cloth wheels grinding, grinding to achieve the same flat surface and no bulge, so that after spraying will not appear local anomalies. 2, there are also in the welding should be adjusted to weld the welding process parameters to ensure that the welding firmly under the premise of minimizing the welded Drumming and deformation.
Welding with the welding machine is a carbon dioxide gas shielded welding machine, compared to ordinary welding machine bulging and thermal deformation is much smaller, grinding with an angle grinder slightly on the line, the amount of grinding is not very large. There is also in the plastic spraying, in the sanding part of the spray thickness is increased appropriately a little better.