Tim Shoppa wrote:
I put preprimed exterior casing around several of my windows and doors
several years ago. I topped it off with oil-based exterior paint.

At the same time, I put some new trim wood (not casing) on the
outside, used an oil-based primer, and an oil-based topcoat.

Now, 5 or 7 years later, the wood that wasn't preprimed is in fine
condition. But in some cases the casing that was preprimed is starting
to peel. And it's not the topcoat peeling off the primer.

Did I do something wrong 5 or 7 years ago by using oil-based paint
over the preprimed casing?

How are we supposed to know???

Maybe, maybe not. I'm sure there was information available from the
manufacturer on whether the primer was compatible w/ latex, oil, or
both, but I surely can't tell from here and now...

In general, it was most likely a dual-use primer but my experience has
been that the prime coat on most of that is _very_ thin and doesn't hold
up any better than unprimed prep'ed well and primed on site.

If it needs repainting, it needs repainting...not much more can be said.

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