Painting on top of gloss

I'm not a painter but that doesn't sound too good.
Anything can be rubbed down and start again with fresh undercoat etc. Find another painter if I were you.

 

Won't last long.

 

You seem to have made a mistake in your opening post, "got a professional decorator in".

 

A good sand will fetch the gloss off no trouble. Each coat of paint is only as sound as the one underneath , gloss on gloss poor adhesion it flakes off if knocked. So you will just have two extra coats to flake off.

 

Any loose stuff needs to come off. You will find it comes off pretty easy possibly in sheets if you can get hold and pull gently. If you get to the stage where your sanding and its sanding and not fetching flakes off you should be ok. Depends what you want really , willing to pay, you will get a better job striping it back to bare wood and starting from scratch you know it's done properly then.

 

It will look ok how long it lasts is anybody's guess. Like I said gloss on gloss gives poor adhesion the amount of coats on top dosnt matter that's the weak point.

 

Can depend on what undercoat is applied, not used Zinnsers before, but 123 says you can paint straight onto gloss.

I've just spent 2 hours sanding the front door.

 

Normally I have used Dulux Trade Quick drying undercoat primer as brought a 5L tub which has lasted several years, so may try a tub of this.

The new tins are now metal, I preferred the plastic ones.

 

A house which I painted a while ago had gloss on gloss, the top layer could be scratched off with your nails as the old paintit hadn't been keyed prior - all had to be sanded back down

 

Hate the metal tins, I decant the paint straight into plastic tubs with air tight lids,(get them free from a cake shop) I got several tins here that have gone rusty inside.

 

Crown 'SOLO' liquid gold!

 

Takes forever to dry though, good on radiators

 

Wack up the heating.

 

You must be doing something wrong, never had that problem........give it a good stir!
Used loads of SOLO up until 2010 when the VOC regs came into force and the majority of oil based paints were turning yellow within a matter of weeks if not days, bought a 2.5ltr can just before Christmas for a quick job, must say my faith is now restored it is soooooooo white I had to wear sunglasses to finish the job.

 

I Used it on my new skirtingboards and panel doors, the skirtingboards being pre-primed MDF dried quickly, but the doors were still tacky the following day, covers well though and as I said above, good on rads, hasn't faded at all.

 

I'd be inclined to search for a new decorator.

 

Just bought a tin of Zinnsers 123.

Tried a test area, and seems really good, very flat finish. Going to to get a small airtight container, hate using the paint out of a 2.5l tin, and the rims get covered with paint.