Oven pride de anno not worked ???

[Gizmo]

No pictures but got some ct crank arms in black ,tried the oven pride
Done fook all , just left the arms matt black 
Used it before on parts sometimes done in under a min .

Any ideas ? Thanks 

[Munnyella]

Probably paint then.

MM

[oberonspacefruit]

as above. try nitromors, if not that then move on to caustic. you sure its not powdercoat? pix would help....

[ED209]

Synstrip if its paint.

Or it might be what they call Hard Anno ... have a couple of goes with Oven pride or get Caustic as Phil said 

[MartyC]

Sugino CT cranks are 4130 Cro Moly so are not annodised.  Did you mean Sugino GT?

What colour were they before?  Ovenpride can sometimes turn the alloy a blackish colour due to the contaminants on the alloy surface, it should polish off.

[Snav]

If they have been left Black surely there is No anno on there 

That discolouration only normally happens once the anno has been removed and is a sigh to Stop 

 

[Mattdub]

What Marty said ^^^^ , CT's are cro-mo so no anno on those beeches ! .........

[Jaan]

Diamond Back CTs hav a black anno spider though, is that what you're trying to strip? 

[Gizmo]

Sugino CT cranks are 4130 Cro Moly so are not annodised.  Did you mean Sugino GT?

What colour were they before?  Ovenpride can sometimes turn the alloy a blackish colour due to the contaminants on the alloy surface, it should polish off.

My mistake gt  now with pics , they were mat black last night after oven pride , today after work got a sort of green tinge to them 










Thanks for ya help 

[NORTY40]

They look like there stripped to me 

Try a bit of wet and dry on them , they should come up silver/alloy 

[Gizmo]

I know what you mean , but 2nd pic down, right hand side of sugino decal
( which dident come off either lol ) is bare alloy the rest dident take , as you say maybe would polish up ok
With allott of work 
I've used this stuff on pedals calipers etc
Left em for 5 mins , striped back to bare metal , wash off under tap dry & autosol for
Shiny shiny
These have pi55ed me off 

[animal]

The lettering has stayed as its paint . This has also stopped the ammo being stripped underneath . Unfortunately when ally is stripped it takes shit loads of work 2 get a nice finish again . I just done an Ultra Dyno resto the same. Pics in this board bit lower down