ZINC RHS ADVICE NEEDED

[centricgtr]

Hey Tuners,

This may seem stupid, but anyways.

How do i go about prepping and painting Zinc RHS. My neighbour fabricated a nice railing for my gallery area out of Zinc RHS, I have no idea how to prep or paint the damn thing though, getting alot of conflicting advice from people.

What products do I use?…Jotun?…Kaleidoscope?
Do i sand the surface first?
Do i use a special primer or oxide?

Any advice would be terrific, I want to do it properly and done. Thanks in advance

[Duane 3NE 2NR]

an epoxy primer followed by a paint - can be oil based, acrylic, epoxy or polyurethane

[Supra GT-FOUR]

Shouldn't it be Etching primer, zinc chromate (gray oxide) then paint (gloss paint or industrial enamel)?

[pugboy]

etching primer, but sometimes it still doesnt etch if the galvanized coating is new so it flakes off
when the coating ages a little and isnt shiny is best

you should paint zinc chromate primer on the welded areas asap as the galvanized coating would have been burnt off there
i find the grey works better compared to red oxide

[shake d livin wake d dead]

Etching primer first, grey /red oxide and whatever color you want to paint after. Lately I've seen rhs rusting (not where cut/joints present). Bad quality products I guess

[centricgtr]

Etching primer first, grey /red oxide and whatever color you want to paint after. Lately I've seen rhs rusting (not where cut/joints present). Bad quality products I guess

Any specific brand of these products I should use?….or it doesnt matter. Also what kind of paint?…oil based?

[centricgtr]

an epoxy primer followed by a paint - can be oil based, acrylic, epoxy or polyurethane

Epoxy primer and etch primer is the same thing?…i see some persons recommending etch primer followed by a regular red/grey oxide.

[matix]

New zinc ( etch primer, grey oxide, paint)
I use kaleidoscope on all the jobs and it holds out really good.


And yes the grey primer works really good.

[Duane 3NE 2NR]

an epoxy primer followed by a paint - can be oil based, acrylic, epoxy or polyurethane

Epoxy primer and etch primer is the same thing?…i see some persons recommending etch primer followed by a regular red/grey oxide.

Not the same.
AFAIK etch primer is porous while epoxy primer creates a moisture barrier

[pugboy]

the crux of the matter is that galvanized surface is hard for paint to adhere to unless it is etched or old

[sMASH]

New zinc ( etch primer, grey oxide, paint)
I use kaleidoscope on all the jobs and it holds out really good.


And yes the grey primer works really good.

Next time I will try that brand Cause I didn't have success with whichever brand I had used .

Resorted to just paint normal ... And it flake off,,, as expected

[pugboy]

what works for sure is spraying or painting wonder rust remover which etches the zinc as it is an acid then regular primer
then rinse off
but wonder ain’t cheap

[matix]