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Re: Block sanding. How am I doing?
Epoxy only works on bare steel. You can overlap the 2k urethane in the adjacent areas with zero negative effects.
The next stage is tricky because if you high build and sand too much, you can burn through the epoxy again. If you do, and the panels is otherwise perfect, you can paint. A tiny area of unprimed epoxy is acceptable to some. If not to you, epoxy prime and paint wet on wet.
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