Why didnt my top coat stick to my undercoat?

[Doran]

I am just trying to gain knowledge as to why my painting didn't work properly, hopefully you can let me know why

I am painting my bare wooden doors.
I did two coats of my undercoat which was Leyland Wood and metal undercoat (solvent based).

And then the next day I went to use Dulux Quick Dry Satinwood as my top coat, but when I went to place it on, it didn't work properly, it kinda behaved like water, as in it didn't stick. (if that makes sense)

I have used this same tin for painting on other surfaces that had different undercoats, and also on to glossy painted surfaces before, so I am trying to work out what I should know so that this doesn't happen again.

All in all not a massive problem as I just did a further coat of the undercoat and decided to leave it at that

thanks in advance

 

[JohnD]

water paint on top of spirit based.

 

[Doran]

ahh ok thanks.. and the other surfaces that this top coat did stick to, which were glossy and at least 15 + years old, must have just (coincidentally) been water based gloss?

 

[JohnD]

it might have been that the solvent had all dried up by then.

rub your hands with white spirit, dry them on a rag, put them in water. the water will not wet them. they will continue to smell of white spririt for a while, until all traces have gone.

you can also wipe the surface with fine sandpaper to dull it, once the primer is hard.

 

[Doran]

Brilliant, thanks for that. Just good to know so I don't make this simple mistake again.

Tbh accidentally buying solvent undercoat was the problem, that stuff is so much more effort to use than water based.

 

[JohnD]

I think solvent undercoat is more durable outdoors, especially Aluminium Wood Primer.

But I have no evidence to support my belief.

If you leave it exposed to the sun for a few days, and wipe it lightly with fine sandpaper, I think water-based undercoat will be OK.

But you can't sand water-based undercoat, it balls.

 

[Chivas69]

You really needed a primer first if it was bare wood!