Replacing Old Powder Coating

[cygnusv]

I want to re-powder coat my bow rails. How to get rid of the old stuff? Paint stripper has no chance - will it burn off?

 

[scruff]

Take rail off, Hand to powder coating man and ask to chemically strip and re-coat.

 

[fastjedi]

I removed the power coating on my steel British Seagull petrol tank a few months back. I used a hot air gun.
Horrible job ..... Power coat turns into a ticky mush .... and back to solid power coat again when cool.

 

[ghostlymoron]

I didn't know Seagulls had powdered tanks. Mine doesn't. Not planning to re-coat as i like the 'distressed' look.

 

[PCUK]

Cut off in strips using a Stanley knife.

 

[Lakesailor]

Take rail off, Hand to powder coating man and ask to chemically strip and re-coat.

Correct. Whatever process you put it through yourself when you take it to be coated they will stick in their bath of gloop anyway.
Powder coating is remarkably cheap compared to fannying about with doing a paint job yourself.

 

[Heat Exchanger Guy]

Whenever we get components powder coated they are always shot-blasted or bead-blasted first. Most of these blasting/coating companies seem to combine both services on one premises and it can be surprisingly cheap depending on what you're powder coating.

 

[Tranona]

I didn't know Seagulls had powdered tanks. Mine doesn't. Not planning to re-coat as i like the 'distressed' look.

Over the years various different coatings were used to try and stop the nasty steel tanks from rusting. different paints, plastic dipping, powder coating. None of them worked effectively so best to find an old brass tank and chuck the steel one. Could tell you about the warranty costs, but even at 30+ years distance it still makes me weep (like the rusty tanks).

 

[ghostlymoron]

Over the years various different coatings were used to try and stop the nasty steel tanks from rusting. different paints, plastic dipping, powder coating. None of them worked effectively so best to find an old brass tank and chuck the steel one. Could tell you about the warranty costs, but even at 30+ years distance it still makes me weep (like the rusty tanks).

Fortunately my tank is a brass one, slightly dented and missing parts of the transfers but it looks the part on my 48 year old motor.

 

[cygnusv]

Take rail off, Hand to powder coating man and ask to chemically strip and re-coat.

I think that this is the way to go, though I did wonder if there was a product available for a DIY job

 

[Bodach na mara]

I never knew it was hard to remove powder coating. The stuff on my Vetus helm pump fell off within a year. That is why I have never had anything powder coated since.

 

[rhumlady]

I think all seagulls should be powder coated at birth. Oh you mean the engine...

 

[cygnusv]

I never knew it was hard to remove powder coating. The stuff on my Vetus helm pump fell off within a year. That is why I have never had anything powder coated since.

Properly applied powder coating is a nightmare to get off. If yours fell off, then the item was not degreased properly, something of an issue since 'trike' was generally banned from use (trichlora********etc) because of it being a particularly nasty CFC

 

[charles_reed]

Properly applied powder coating is a nightmare to get off. If yours fell off, then the item was not degreased properly, something of an issue since 'trike' was generally banned from use (trichlora********etc) because of it being a particularly nasty CFC

and a potent liver toxin, which was the more potent reason for it's banning.

powder coating is certain to come off alloy castings after a period of time - like all coatings water gets through the porous coating and the resultant Al hydroxides just lever it off. Many cheapjack manufacturers try to persuade the gullible that powder coating is weatherproof. Hard anodising is the only adequate protection of Al components for marine use.

 

[PhillM]

Had my pullpit redone this year. Shop it was taken to shotblasted it and re-did it. All in for less than £100 and it looked like new. How long it will stay that way remains to be seen....

 

[Nudge]

Having started and run a powder coating plant and business, the chemical we commonly used for stripping epoxy and polyester powder coatings was Methylene Chloride. Usual solvent cautions apply. Suppliers tend to sell in 25l drums and need usual COSH regs to be in place for users.

Blasting not only cleans but textures the surfaces for good adhesion. For good quality coatings, the supplier should preheat the item uniformly, apply the base powder, reheat to get stablilty for a short period then apply the lacquer of the appropriate type for the job

Nudge

 

[MM5AHO]

As another powdercoater, I second methylene Chloride.
Sotblasting does indded remove powdercoating, and reprofiles the metal which can be good for adhesion, bt a good chemical pretreatment (probably of at least 5 stages) is better.

Powdercoating is something that many people think is a coating. It is not the coating, but the method of application.
Powdercoating can be used to apply polyester, epoxy, polyurethane, plastic, hybrids, anti graffiti coatings, nylon, antibacterial coatings and many more.
To say "I'll get this powdercoated", is not more descriptive that to say that you'll use a brush to apply a coating.
Its what powder formulation you use that counts.
And just like paint, there's el-cheapo powder, good stuff, excellent stuff and super duper stuff.
For example, I re-coated my 30year old aluminium cast hatch cover with Interpon D2525 4 years ago. Looks like new.
If the powder falls off something, then it was done poorly, or the wrong powder was used for the situation.