Spent a few years painting full time and many more in DIY mode.
1st off, why does anyone still use gloss paint indoors? It went out of fashion in the 80’s. only ever use the stuff on exterior woodwork (an exterior variant).
As for Dulux, had many bad experiences with this – satinwood and gloss oil based. Very thick consistency and rubbish opacity. How do they make such inferior paint that is so difficult to apply with good results!?! 3 coats on a white primed base before it looked acceptable – complete waste of my time waiting at least 24hrs between coats!
I’ve tried satinwood waterbased and it never flows, so you always end up with brush marks that spoil the end result.
My recommendation is for an oil based satinwood/eggshell by Johnstones – fantastic stuff, used many dozens of 2.5l tins of the stuff. It’s good to recoat within 4 hours in warmmish ambient temperatures. This makes this competitively priced paint far more commercially viable when on a price! Can’t be doing with wasting endless days waiting for inferior paint to dry, especially when you need an extra coat of the stuff to achieve results easily attainable with trade paint!
I once reluctantly tried a water based woodwork paint designed to refinish kitchen doors. A small tin of this Crown kitchen paint passed the light scrape fingernail test when freshly dried with flying colours. So my opinion of water based paints then changed, but this small time was 5 times the price of what I used most of the time..
Washable matt paint was good to apply as well. First coat gets absorbed, thinking you haven’t enough for the second coat. The second coat goes miles as the first coat absorbs next to no moisture.
I think for heavy traffic, oil based paints win hands down. Yellowing is unavoidable, but I find the eggshell and satinwood finishes less susceptible.