House built 5 years ago in Chiang Mai , 1 years ago full repaint job outside, both times using typical paint brands often used in Thailand.

 

Now, mostly still OK except the 12 X 10 cm square steel columns which hold up the veranda around three sides of the house. Paint on these columns not flaking but patchy and looking poorly. When the columns were installed they were treated with an undercoat but not sure if this was the correct type / quality of undercoat.

 

Would appreciate any recommendation from the experts re better / more professional paint brands / specifics of types of paint etc., for steel columns available in Thailand . Not so concerned about price, willing to pay for better quality.

 

Thanks.  

 

  House built 5 years ago in Chiang Mai , 1 years ago full repaint job outside, both times using typical paint brands often used in Thailand.  

Now, mostly still OK except the 12 X 10 cm square steel columns which hold up the veranda around three sides of the house. Paint on these columns not flaking but patchy and looking poorly. When the columns were installed they were treated with an undercoat but not sure if this was the correct type / quality of undercoat.

 

Would appreciate any recommendation from the experts re better / more professional paint brands / specifics of types of paint etc., for steel columns available in Thailand . Not so concerned about price, willing to pay for better quality.

 

Thanks.  

 

 

 

 A picture, or three, including a close up and showing reflection or not would save a thousand words, then we might be able to glean what type of paint is on there now.

Better still pictures and words like oil paint, gloss, matt, primer/undercoat visible, and what happens when u use a scraper or wire brush on a test patch. Does it flake off in a dusty way or in substantial cohesive pieces :)

 

If the topcoat's only been on a year it sounds like they may have just slapped some water based paint on, but one hopes the original paint is oil based, let's have a look.

 

Worry first about how to prepare a good surface for repainting and what to use, think about brands etc after.

 

 

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11 hours ago, cheeryble said:

 A picture, or three, including a close up and showing reflection or not would save a thousand words, then we might be able to glean what type of paint is on there now.

Better still pictures and words like oil paint, gloss, matt, primer/undercoat visible, and what happens when u use a scraper or wire brush on a test patch. Does it flake off in a dusty way or in substantial cohesive pieces :)

 

If the topcoat's only been on a year it sounds like they may have just slapped some water based paint on, but one hopes the original paint is oil based, let's have a look.

 

Worry first about how to prepare a good surface for repainting and what to use, think about brands etc after.

 

 

Sent from my iPad using Thailand Forum - Thaivisa mobile app

 

 

 

Thanks, as suggested I will take and share some photos. 

Also look on the quality designation. 'A' has more pigment then 'B' which has more then 'C' and so on.

You need less coats when using an 'A' version. Normally 2 is enough. With 'D' it can be 4-5 as it has very little pigment and the first layer is almost transparent.

8 hours ago, Khun Jean said:

Also look on the quality designation. 'A' has more pigment then 'B' which has more then 'C' and so on.

You need less coats when using an 'A' version. Normally 2 is enough. With 'D' it can be 4-5 as it has very little pigment and the first layer is almost transparent.

I've learned something.

Is this on all paints here, water and oil?

Most of the water based wall paints have it. On oil based i have not seen. 

Both water based paint and oil base paint have the 4 base letters in Thailand. Each of the major brands of paint sold in Thailand will have different series of paints. Different COLORS of paint determine which base to have mixed. TOA, Jotun, Nippon, Dulux all have at least three series of oil base paint for metal. They offer at least seven series for water base paint in each brand. The brochures will show the properties of each series and the warranty. If there is not at least 10 years listed for the warranty on the bucket of water based acrylic paint in Thailand you might use caution. I've seen firsthand how warranty coverage can be handled in Thailand for house paint. The prep work is so crucial as pointed out by Cherryble.  Using quality paint brushes and quality paint rollers or a Graco airless paint sprayer has resulted in better paint work in my observation.