DMA

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Hello,

I painted a door and after the paint had dried some defects were showing. On some areas, it looks some bits of dust/dirt had possibly blown onto it, but other areas the dried paint had mini round indented ditches/spots.

It was a while ago when I painted it, but from my memory, I think it was painted using Dulux Trade high gloss, and before painting it I gave it a good sand down and wiped it down with white spirit.

I plan on re-doing the door again within the next couple of weeks. Does anyone know what could have caused the defects last time?


I have attached photos >


IMG_20190428_112835.jpg
IMG_20190428_112858.jpg
 

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DMA

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Air bubbles?
Thanks Ian, but I don't think it would be bubbles, I would have probably noticed it at the time of painting and also I most probably brushed the door down immediately after painting to prevent any drips, etc.
 
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It has sissed, like when you emulsion over silicone, maybe the paint didnt like the white spirit you cleaned the door down with, bad paint ie oils not mixed properly.
 
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DMA

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It has sissed, like when you emulsion over silicone, maybe the paint didn't like the white spirit you cleaned the door down with, bad paint ie oils not mixed properly.
Thanks, I had a feeling it might have been that. I wanted to check though before I go tell the client to buy the product to fix it and I re-do the door. Might have been caused by the owner of the door having cleaners clean it with polish or other household cleaning products maybe?

Do you recommend any particular product to use to correct it? I was thinking maybe "Anti silicone 804?"
 
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Thanks, I had a feeling it might have been that. I wanted to check though before I go tell the client to buy the product to fix it and I re-do the door. Might have been caused by the owner of the door having cleaners clean it with polish or other household cleaning products maybe?

Do you recommend any particular product to use to correct it? I was thinking maybe "Anti silicone 804?"
I have never used that I normally sugar soap down and then clean off with fresh clean water. :)
 
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I think it could be moisture trapped in the wood trying to escape. Driving rain wetting through an you sealed it in. Is it facing west?
 
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DMA

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I think it could be moisture trapped in the wood trying to escape. Driving rain wetting through an you sealed it in. Is it facing west?
Hi Jeff, the door is facing north. The door had already been painted by somebody else in a high gloss black paint. I was just giving it a fresh coat whilst I was doing work on other areas of the ground. Originally I think the door was a varnished door, but he later wanted to change it to a high gloss paint instead of varnish because the varnish was not protecting the door from rainwater damage, but that would probably have been years before I gave it the fresh coat of black high gloss?
 
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Household polish contains silicone. The craters you describe sound like silicone related fisheyes. That said, in the second image it does look like air bubbles. I recall painting a facia board with DT black gloss many years ago (in direct sunlight light). Some of the bubbles expanded to about 4mm before bursting and leaving a raised edge crater.

The problem that you now have is that you have no way if knowing if the door has been polished again since you last painted it.

I have never used a dedicated silicone remover- they tend to be the reserve of car sprayers.

Personally I would just sand the whole door back with 240 grit Abranet and then use a dusting brush, then vacuum the dust off with a brush attachment, re brush with a dusting brush and then tack cloth it. Then wipe my hand over it to ensure that I have no black dust on my hand.
 
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DMA

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Household polish contains silicone. The craters you describe sound like silicone related fisheyes. That said, in the second image it does look like air bubbles. I recall painting a facia board with DT black gloss many years ago (in direct sunlight light). Some of the bubbles expanded to about 4mm before bursting and leaving a raised edge crater.

The problem that you now have is that you have no way if knowing if the door has been polished again since you last painted it.

I have never used a dedicated silicone remover- they tend to be the reserve of car sprayers.

Personally I would just sand the whole door back with 240 grit Abranet and then use a dusting brush, then vacuum the dust off with a brush attachment, re brush with a dusting brush and then tack cloth it. Then wipe my hand over it to ensure that I have no black dust on my hand.


Thanks for the tips. Hopefully, this time around the door will come out perfect
 
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Centre rail looks badly worn under the paint, you cant get a good finish without correct preparation.
 
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