The usual story of grabbing the wrong thing off the shelf and only noticing after the work was done...
I'm not bothered by the short-term outgassing, but I'm concerned that exterior paint is often softer than interior, as it has to flex more in outdoor conditions.
I still have a coat to go on my skirting boards.
If I buy the equivalent latex paint in its interior form and use that for the final coat, will its strength be compromised by the softer first coat? Would I be better off completing the work all with exterior paint?
Obviously the very best that I could do is sand it all down and start from scratch. That's not going to happen.