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Old 22 June 2009, 03:43   #11
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Don't fit it until you have decided what to do with it!

Use oxalic acid to remove the rust and then polish it using a buffing wheel on your drill.

It will be as much work to prepare it for painting or powder coating andit will look better!
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Old 24 June 2009, 15:53   #12
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What about using acid etch primer to prep the stainless?
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Old 24 June 2009, 20:57   #13
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Stainless steel is stainless because a layer of chromium oxide quickly forms on its surface to isolate the underlying steel. You don't really want to remove this protection.
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Old 25 June 2009, 02:42   #14
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Quote:
Originally Posted by jwalker View Post
Stainless steel is stainless because a layer of chromium oxide quickly forms on its surface to isolate the underlying steel. You don't really want to remove this protection.
I take it that polishing to a bright finish doesnt remove that 'passive oxide' coat though ?
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Old 25 June 2009, 05:38   #15
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My understanding is that is does but the chromium quickly reacts with oxygen to form a new coat.

I've used polyurethane transport paint and the International paint I've mentioned earlier and they both adhered well to the bare metal after it was cleaned using thinners. Most paints harden with age so I guess damage will occur under impact. Much like it would to a car or other painted object.
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Old 30 July 2009, 23:51   #16
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cerakote finnish

we use it here in the us on guns but would work great on marine stuff never rusts its ceramic smells nasty and fun to spray but would last years and comes in lots colors web site is called NIC Co hope this helps
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Old 31 July 2009, 07:17   #17
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I would seriously polish it and see how it comes up. As Jwalker points out it quickly passivates then its virtually maintenence free.
painting may seem like a quick fix but once its painted you wil need to keep painting it as damage occurs.
if you do paint it to do a really pukka job you should get it media blasted, leave to passivate a few days ,acid etch primed, then painted with a 2pack epoxy or PU. powder coating is fine too if its done properly, and as NOS observed it rarely is.
To be honest to paint it properly would cost near as much as a new A frame, I see Halfrauds do sell acid etching primer in aerosols 10 last time i looked, may be worth a try? with top coat of your choice as a cheap DIY job!
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Old 31 July 2009, 12:09   #18
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If the "repairs" are rusting they may have been done with non-stainless rod or you may simply have oxides left from the welding process. To remove the dirt etc asociated with the welding find some pickling solution, a local welding supplies outfit will know what it is. Then as previously said polish to mirror finish. If you dont mind a more neutral workmanlike finish you could get it bead blasted BUT make sure they dont use same beads as ferrous work or like the wire wool mentioned earlier it will set your stainless of rusting "stainless" steel is a misnomer, more like rust resisting steel.
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Old 31 July 2009, 14:15   #19
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use plasticoat spray enamel on it after scuffing it up with 320 grit paper
then flat it with a scotchbrite pad and give it a couple or four coats of plasticoat laquer

A friendly chat with a spray shop could see you 40 quid lighter and have it two packed in black then baked
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