Solvent reaction

[jim0207]

Using PPG Shopline. After the base coat was dry I sanded out some dirt nibs and exposed the primer. I feathered the area and shot it with high build primer. In 5 minutes the base coat edge begins to lift or bite. What causes this and how do I repair the area so it is flat and ready for the clear coat?

 

[skidlid]

You will have to reapply the primer lighter the first few coats. Your basecoat has not catalyst to it. This will happen sometimes, PPG DBU has a catalyst in it so this would not be a problem their DBC line and such does not use a catalyst in it unless you add it to the reducer (dbx57 it think).

 

[jim0207]

You will have to reapply the primer lighter the first few coats. Your basecoat has not catalyst to it. This will happen sometimes, PPG DBU has a catalyst in it so this would not be a problem their DBC line and such does not use a catalyst in it unless you add it to the reducer (dbx57 it think).

Bought a touch up gun and sprayed several thin coats and there was no biting. I thank you vary much. Great tip for novice painter such as I. The project can now move forward.