How to paint White primed Lincoln doors?

[Dave B1]

The doors have a plasticy smooth finish not ordinary undercoat. The salesman said they are ready to paint and the doors are described as primed. Is it ok to paint them with just oil based gloss or satinwood or will they need some kind of undercoat first?

 

[Wayners]

Are they pre painted or undercoated?
You can buy either. Sounds like pre painted finish.
Look at the door spec online if you know what they are.
Either way it will be waterbased paints
Just be aware of oil paint yellowing quick Vs waterbased paint.

 

[Dave B1]

They are not actually my doors, the lady who has them says she doesn't have the paperwork for them so I took a photo and did Google lens and the first few results came up 'primed' https://www.climadoor.co.uk/internal-doors/single-leaf-internal-doors/lincoln-white-glazed Apparently the fitter said the doors were ready to paint so I assume I can just paint them with a finishing coat of paint but I want to be sure because as they are not my doors I don't want to mess them up. Regarding paint I know oil based paint can yellow but in my experience water based paint just isn't very durable.

 

[Wayners]

Durable in what way?
Benjamin Moore Scuff X or Johnstone's Trade Aqua Guard is very durable.
Won't yellow either.
If you are familiar with oil paints and a DIY person maybe stick to what you know.

If doors have a factory primer then denib with 180 grade foam sanding pads.
I always used a undercoat as the factory primer can be a bit rough and dry depending on the quality and then top coat.

 

[michealangelo]

They are not actually my doors, the lady who has them says she doesn't have the paperwork for them so I took a photo and did Google lens and the first few results came up 'primed' https://www.climadoor.co.uk/internal-doors/single-leaf-internal-doors/lincoln-white-glazed Apparently the fitter said the doors were ready to paint so I assume I can just paint them with a finishing coat of paint but I want to be sure because as they are not my doors I don't want to mess them up. Regarding paint I know oil based paint can yellow but in my experience water based paint just isn't very durable.

I would use some crown px 4 to ensure there is a good surface then use the paint of your choice

I prefer oil based paints to finish personally , a good quality satinwood for example

 

[Dave B1]

Thanks, I've never used Crown PX4 but that sounds easier than sanding (especially the fiddly grilles). I've got some Owatrol ESP easy surface prep here but I'm not certain how effective it is? To be honest the doors look fine as they are but the lady would like them painted. I might try the Crown PX4 and then finish with an oil based satinwood. I've also contacted the manufacturer of the doors for their advice as I don't know what the primer/finish actually is.

 

[Wayners]

Factory use acrylic primer undercoat waterbased. Standard stuff

 

[Dave B1]

Factory use acrylic primer undercoat waterbased. Standard stuff

Ok thanks, can I paint Johnston's Trade aqua guard straight onto this? I have found it difficult to get a good durable finish with water based paint it dries too quick drags leaves brush strokes and seems to scratch off easily. I don't think I've ever used Trade aqua guard before though

 

[michealangelo]

Thanks, I've never used Crown PX4 but that sounds easier than sanding (especially the fiddly grilles). I've got some Owatrol ESP easy surface prep here but I'm not certain how effective it is? To be honest the doors look fine as they are but the lady would like them painted. I might try the Crown PX4 and then finish with an oil based satinwood. I've also contacted the manufacturer of the doors for their advice as I don't know what the primer/finish actually is.

I share the same feelings regarding water based finishes but that is just my opinion

Zinser 123 , PX4 , Bedec All Prime are all in my opinion useful on pre painted surfaces as adhesion primers ....paint will stick and not flake off on them

 

[Wayners]

Doors are so dry. The pros spray products like Akzo Nobel wp136 primer sealer though HVLP or airless to seal factory primer.
Easier way which I myself have done many times is warm up a rattle can of zinsser BIN in hot water, and spray the moulded door bits and then rolled the rest to seal doors.
Depends on the finish you require. I've even got gardz on doors and left the hung door on if rental bashing on price. Straight on with top coats. I don't recommend this type of work though...

One tip
I always take doors off to paint as takes 2 minutes.
Cut 4 x 12ich wooden battens.
Drill holes in centre. Screw to ends of the the door as legs so door is horizontal. Paint one side of door then flip door over and paint the other side. No waiting and gravity prevents runs.

 

[Dave B1]

I got a reply from the company that sells the doors, apparently they are primed with an oil based primer. Could I just paint them with oil based Dulux Once (I've read this acts as undercoat and top coat? I've had good results with Dulux Once in the past and find it's quite thick so doesn't run if I'm careful not to paint to much on. So I wouldn't have to remove the doors.

 

[yorksbuilder]

They are already primed, so no point using the Once paint.

Do this, using Crown fast flow quite dry satin. Stays white nicely too.

I always take doors off to paint as takes 2 minutes.
Cut 4 x 12ich wooden battens.
Drill holes in centre. Screw to ends of the the door as legs so door is horizontal. Paint one side of door then flip door over and paint the other side. No waiting and gravity prevents runs.

 

[michealangelo]

I got a reply from the company that sells the doors, apparently they are primed with an oil based primer. Could I just paint them with oil based Dulux Once (I've read this acts as undercoat and top coat? I've had good results with Dulux Once in the past and find it's quite thick so doesn't run if I'm careful not to paint to much on. So I wouldn't have to remove the doors.

No , once is not going to give you a good finish

Once , solo , self undercoating gloss , etc .....are a bit of a con trick in my opinion

Even if these paints are ever used its always good practice to undercoat first

But I wouldn't use them , follow the sort of advice on here

 

[Wayners]

One coat paint says to use on prepared surface, not that anyone reads the data sheet.
People buy it and slap on without any preparation.
It's nothing special. Just had thickening agent in it so it goes on nice and thick. Lovely stuff! Not

 

[michealangelo]

My view is ...a one coat paint ....be it gloss , satin or emulsion ......is still going to be better off if it's got an undercoat beneath it .....even if the one coat paint is amazing ....which they never are

Yes its one coat .....but self undercoating ? I think that's nonsense

I worked for a guy who used to treat all his woodwork the same , quick rub down .......one satinwood if he could get away with it .... a cheapo acrylic primer undercoat for everything else

I used to say one coat of satinwood it might say on the dulux tin but one coat in the real world is cowboy behaviour

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