Step 2 spray a little expansion glue
3. Cut off the excess gum.
Step 4 fight
5. Apply a layer of rust inhibitor.
6. Cut a glass fiber net.
7, fusion resin glue and hardener, daub with a brush.
8. When the glue dries, polish the corners with a grinder.
9. Apply putty after polishing.
10, sanded.
1 1, just paint it.