Gloss paint not sticking well to undercoat?

lucernarian · 11-05-2011 12:31PM #1

Hi there,

I'm giving some skirting boards a new coat of paint including some new boards. The new skirting was painted first with undercoat a few days ago and all is well and it gave a slightly rough surface as normal. The day before yesterday, a coat of "high gloss" was put on this. I was touching up one previously undiscovered chip in the board with filler and when I was levelling the filler with a scraper, the surrounding paint started to peel off slightly. I also wiped the vicinity down with a damp cloth and that also took off a tiny bit of gloss coat in a couple of places.

Surely the gloss should be sticking to that undercoat like the proverbial to a shovel?

Also, for the existing painted boards, is it better to go with just the high gloss on top or the "one coat gloss" you can get? One coat gloss was always used before but we have separate gloss and undercoat for this job.

mailforkev · 11-05-2011 12:39PM

Just did a stack of this in my own house.

Were both the undercoat and gloss oil-based?

lucernarian · 11-05-2011 12:41PM

Yeah, both oil-based dulux stuff.

bazmak · 12-05-2011 03:35PM

was it bare wood?
did you not prime them first?

getz · 12-05-2011 03:48PM

i worked for the third largest paint company as a QC manager for 21 years,it was often a problem i came across, if the undercoat had been painted onto a greasy surface[oily]. salvent [spirit]paint will not stick,i am not saying that is the problem,but it is the main one i met .

getz · 12-05-2011 04:05PM

you have my 70 year old brain working again,on the technical side,it just may be you have a bad batch of gloss, may be it was run off at the end of the tank,ie a bad viscosity[to much spirit in it],or the wrong match of driers,take it back for testing,and get another,or phone/text/email the QC at head office,if i remember it used to be in darwin in lancashire,its on the bottom of the tin for help.

lucernarian · 12-05-2011 04:38PM

The wood was not primed, just sanded down and undercoat put on. The undercoat is performing and is sticking completely to the wood. The gloss that was put on top of this is not sticking very well and is still somewhat soft 4 days after being painted. A credit card would easily scrape the layer away.

getz · 12-05-2011 05:09PM

To_be_confirmed wrote: »

The wood was not primed, just sanded down and undercoat put on. The undercoat is performing and is sticking completely to the wood. The gloss that was put on top of this is not sticking very well and is still somewhat soft 4 days after being painted. A credit card would easily scrape the layer away.

i would put my money on it ,that it is a bad batch of paint you have,if the correct combination/ballance of driers have not been added the paint will never dry,take it back to the shop,they will give you another tin and send that back to the manufactures .

cardwizzard · 12-05-2011 07:46PM

TBC can you put up a link or a pic of the cans of paint that you have used. That would really help. All the new rules regarding paint laws have sent manufactures mad.

The softness you mention has become a real problem along with drying times. 28 days before its cured according to some companies!! Oil shouldn't take like this though.

bazmak · 12-05-2011 08:40PM

i second the bad tin of paint theory!
unless their is lots of moisture still in the wood or their was a preservative or coat of varnish etc put on , their is no reason the gloss shouldnt stick and dry .
google the paint you used and see if anyone else has that problem:)

Paul.C · 18-05-2011 01:06AM

Did you wipe the wood with a damp cloth when you finished sanding?

Only time this ever happened to me was when I didnt give the first coat enough time to dry. 2 days between coats and it comes up perfect. Some may think im mad for leaving that long between coats but hey! It works for me:D

Gloss paint not sticking well to undercoat?

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