Painting Garage Door - Help!

bendpsmith

Ok I think i messed this up - paint flaking alert!

Background:
I'm doing up alot of things in our house atm - Kitchen (repaint w/Farrow & Ball), Bathroom & Ensuite change, etc.

All is going well with the above and between my mammoth of tasks i decided to fit in repainting the garage door. It's in good condition as paint was not falling off and no rust, etc. The colour was just faded and looking a bit naff.

What i did:
I bought some Dulux Weathershield for exterior metal & wood. (In Gallant Grey for those interested).
I brushed the door down to get rid of obvious dust and debris.
I then washed the door with a soapy solution and cloth by hand.
Then rinsed with fresh water and left to dry.
I applied one coat of the paint by brush (decent quality one) and left to dry.

Results:
Having looked at it this morning 90% of the door looks fine but 10% of it has bits flaking off.
Now I didn't sand as the previous paint was matte to touch so I assumed it had a key for the new paint to adhere to. I didn't prime as the instructions said to only do so for bare galvanized metal or wood.

My only thought was maybe it was too cold to paint properly (read the can said over 10 degrees but it was probably around 4/5 degrees). But why would only parts then flake off?

So what do i do - help and advice needed!
Do i just need to sand these areas now to prevent getting worse and repaint when warmer?
Was it just the temperature that was the issue or should i have primed (red oxide?)

We're looking to sell the house so want it to look at least decent for now and really for the new people not to have to repeat in 6 months.

Much Appreciated
Ben

Aylesbury_Duck

bendpsmith wrote: »

Ok I think i messed this up - paint flaking alert!

Background:
I'm doing up alot of things in our house atm - Kitchen (repaint w/Farrow & Ball), Bathroom & Ensuite change, etc.

All is going well with the above and between my mammoth of tasks i decided to fit in repainting the garage door. It's in good condition as paint was not falling off and no rust, etc. The colour was just faded and looking a bit naff.

What i did:
I bought some Dulux Weathershield for exterior metal & wood. (In Gallant Grey for those interested).
I brushed the door down to get rid of obvious dust and debris.
I then washed the door with a soapy solution and cloth by hand.
Then rinsed with fresh water and left to dry.
I applied one coat of the paint by brush (decent quality one) and left to dry.

Results:
Having looked at it this morning 90% of the door looks fine but 10% of it has bits flaking off.
Now I didn't sand as the previous paint was matte to touch so I assumed it had a key for the new paint to adhere to. I didn't prime as the instructions said to only do so for bare galvanized metal or wood.

My only thought was maybe it was too cold to paint properly (read the can said over 10 degrees but it was probably around 4/5 degrees). But why would only parts then flake off?

So what do i do - help and advice needed!
Do i just need to sand these areas now to prevent getting worse and repaint when warmer?
Was it just the temperature that was the issue or should i have primed (red oxide?)

We're looking to sell the house so want it to look at least decent for now and really for the new people not to have to repeat in 6 months.

Much Appreciated
Ben

Looks like that's your problem. 4-5 degrees is far too cold if the minimum is 10 degrees. I would wait until we have warmer weather and repeat your otherwise good steps.

Richard_Overton_2911

Agree with Aylesbury but would add you need to sand down the door ideally with either 60 or 80 grit glass paper (sandpaper you put on the floor of a budgie cage) . Making sure you rub all of the timber with the paper which will roughen the existing paint surface (called Keying) and this will help the new paint stick (key) .

Then wash down ,allow to dry and then if you have any bare timber you need to use a timber primer , then allow to dry. Then undercoat and allow to dry, very lightly rub down with glasspaper (again to creat a key) , brush off dust and apply a 2nd undercoat. Allow to dry and then top coat.........

Please don't use these "one coat" paints which are rubbish.I would suggest a decent spirit based system rather than a water based system. Sikkens make some excellent paint systems and are available through nationwide decorators merchants such as Trade Paints and Brewers. They will give you some good advice too.

EDIT: I think the weathershield system thats for wood,metal etc is water based and I'm dubious of any paint thats for timber,metal,Upvc etc. Any waterbased system shouldn't really be used this time of the year or the Autumn due to drying issues. The morning,evening damp due will ruin it before its dried properly. Any water based product giving a 6yr warranty will be almost impossible to claim on due to proving the paint was defective.

If you like the Weathershield colours then go for their spirit based products ie primer/sealer (if required for bare timber) undercoat and top coat..

bendpsmith

Thanks both...

Should i sand the flaking areas now or leave a few days for it to cure? Or just leave it until warmer?
Will it likely get worse if i don't?

Richard - FYI garage door is metal rather than timber - hence i didnt user a primer but wondered if i should use red oxide on the areas which did flake off.

Appreciate the advice

bendpsmith

Yes i think it is a waterbased system - also low VOC (which seem to come hand in hand!).

I assumed - maybe wrongly - that it would be suitable for Garage door as meets the criteria of the product and also Dulux don't seem to have a specific garage door paint.

I'd hoped dulux would be better than the usual one coat stuff. I'm concurrently painting our kitchen cabinets and used some Ronseal Cupboard door paint. Prepped as per instructions and it looked awful even after 2 coats. Luckily i only tested on 1 door.

Took it back for a refund then bought the expensive Farrow & Ball stuff. Cleaned, sanded & primed all the doors and frame then applied 2 coats of topcoat (estate eggshell) to a large area to test - looks beautifully smooth and no show through. Cant wait to do it all.

Anyway that enough off topic. Be keen to hear you thoughts on my previous reply.

Aylesbury_Duck

It won't make any difference whether you sand now or in a few days.

bendpsmith

Would you recommend i do it now then rather than wait until warmer?
Will it make the peeling worse by not sanding it now?

Thanks