Pocster Posted February 18 Posted February 18 (edited) I’ve got a touch up pen for the odd chip etc but as you can see the black coating ( I assume powder coating ) is peeling off . Can I prevent this ? Fix it ? Edited February 18 by Pocster
JohnMo Posted February 18 Posted February 18 Smallest defect in powder coat and it's rubbish. Water gets in and corrosion starts unseen, by the time peeling starts it's too late. Strip back as far as you can and paint, you may need a plastic primer on powder coat so it sticks. 1
Pocster Posted February 18 Author Posted February 18 (edited) 10 minutes ago, JohnMo said: Smallest defect in powder coat and it's rubbish. Water gets in and corrosion starts unseen, by the time peeling starts it's too late. Strip back as far as you can and paint, you may need a plastic primer on powder coat so it sticks. Plastic primer ? Not a steel primer then paint ?? Or do you mean plastic primer over existing ( edge ) of flaked coating , then paint the lot ? Edited February 18 by Pocster
JohnMo Posted February 18 Posted February 18 26 minutes ago, Pocster said: Or do you mean plastic primer over existing ( edge ) of flaked coating , then paint the lot ? Plastic primer on any existing powder coat that doesn't come off. Then paint the lot. 1
Tom Posted February 18 Posted February 18 That looks galvanised no? Might need an etch primer on the zinc IIRC. 1
Pocster Posted February 18 Author Posted February 18 11 minutes ago, Tom said: That looks galvanised no? Might need an etch primer on the zinc IIRC. No idea . Is there a definite way to tell ?
Tom Posted February 18 Posted February 18 29 minutes ago, Pocster said: No idea . Is there a definite way to tell ? If it's silver with a bit of white powder on it (which it looks like it is) then it's highly likely to be galvanised. Unprotected mild steel would be covered in rust. Looks like the powder coat was just a cosmetic thing rather than to protect the metal, which, as above, rarely lasts long anyway. Galvanised you'll be good for years! 1
Pocster Posted February 18 Author Posted February 18 Just now, Tom said: If it's silver with a bit of white powder on it (which it looks like it is) then it's highly likely to be galvanised. Unprotected mild steel would be covered in rust. Looks like the powder coat was just a cosmetic thing rather than to protect the metal, which, as above, rarely lasts long anyway. Galvanised you'll be good for years! So spray with etch primer then paint ? ( which type of paint ? )
Tom Posted February 18 Posted February 18 36 minutes ago, Pocster said: So spray with etch primer then paint ? ( which type of paint ? ) I guess so. Not sure what paint tbh, I'd normally say something oil based that needs highly toxic chemicals to clean the brush after, good old fashioned stuff. However, seems most paints these days are water based and less toxic, disappointingly. Why not just scrape off the powder coating though and bask in the majesty of the galvanising? 1
Pocster Posted February 18 Author Posted February 18 7 minutes ago, Tom said: Why not just scrape off the powder coating though and bask in the majesty of the galvanising? What all 15 steps ? 🤔🙄🤣 1
Pocster Posted February 18 Author Posted February 18 Can’t I just use a ronseal / hammerite type paint straight to metal type thing ?
MikeSharp01 Posted February 18 Posted February 18 Is the material magnetic? It looks like oxidised Aluminium to me, so won't be galvanised steel.
Pocster Posted February 18 Author Posted February 18 (edited) 8 minutes ago, MikeSharp01 said: Is the material magnetic? It looks like oxidised Aluminium to me, so won't be galvanised steel. Erm , don’t know . Can check … Actually from memory the 1 stair stringer was 150kg so not Ali …? Edited February 18 by Pocster
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