New answers tagged finish
1
You shouldn't need to strip unless you scratched through to wood.
The problem with polyurethanes is that they are hard films that don't blend with the previous coat. Other finishes will 'melt into" the previous one (lacquer, shellac, tung oil)
Your sanding, @220, was too aggressive. Intercoat sands should be at 320 - 400.
You will have to sand back to a ...
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