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I've primed some new wood with Dulux aluminium wood primer which is solvent based. Probably overkill, but I wanted a very good seal. I plan to finish with two coats of Dulux eggshell, which is also solvent based.

My question is firstly whether I need an undercoat at all, and secondly whether this also needs to be solvent based.

I have some Dulux water based undercoat which needs using up. Can I use this between two solvent based layers?

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I would not mix types of paint like that.

Most paint systems I have worked with are designed so that the successive coats work together. Rust Oleum etc

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  • I thought is was OK to use latex over oil, but not the other way around? Latex paint breathes, and oil products don't. So if you put oil over latex, moisture/air permeating the latex gets trapped and causes the oil top coat to blister.
    – SteveSh
    Jun 27, 2020 at 13:09
  • @Solar Mike: Agreed. A lot of engineering goes into making paint and they are a "systems" as you said. One more consideration is the type of "solvent". I've seen horrible, blistering results when a "hot" paint was applied over other paint. It dissolved it and made a HUGE mess. (Thankfully, it wasn't me doing it). If that happens, you end up having to strip the entire piece.
    – George Anderson
    Jun 27, 2020 at 14:21
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You do not need an additional undercoat after the prime coat. I am not even sure why you are proposing it.

The manufacturer does not recommend it:

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  • The manufacturer doesn't specify what the "appropriate paint system" comprises. Hence my asking.
    – Tim
    Jun 27, 2020 at 18:30

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