Retouching frame finish

[Junglist]

I have damaged the finish on my frame by using an ill-fitting BB tool. There are 3 areas on the bottom bracket shell, 2 underneath and 1 on top. The finish is a textured matt black anodising on a 7005 T6 alloy frame. I have rubbed down the areas ready for painting as shown in the photos.





My research has suggested I need an etching primer, although I don’t know what effect it may have on the surrounding anodising. I had hoped to use a brush rather than spray but this I understand is not advised as you need a thin layer which is difficult to control with a brush.

As for the top coat, I’m not sure if matte or satin will be the better match and there’s so many different types of paint I don’t know where to start. I’m not expecting a professional finish, just a hard wearing one.

I also need advice on masking tape as I don’t want paint on the face of the BB shell.

Thanks, Mark

[Bolt]

Given that the paint damage is mostly out of sight I'd be more focused on protecting the frame than trying to obtain a perfect finish. To that end I've had good results from this paint that can be applied directly to pretty much any surface including aluminium.

[The French Tandem]

Automotive touch up pens? £5.49 in your nearest Halfords.
 

[drossall]

That's what I often use, and of course there is a wide choice of blacks.

[Junglist]

Thanks for the replies. I'll check out that paint.

[phantasmagoriana]

I normally just use nail polish!

[Blodwyn Pig]

I normally just use nail polish!

^^^ whs. Clear, if needs be.

[rogerzilla]

That's what I often use, and of course there is a wide choice of blacks.

I found one that's an almost perfect match for Moulton ivory powdercoat.  I need to touch up an old Hobbs frame and may take the fork into the shop to try and find a decent match.

[trekker12]

As a model aeroplane maker I have stocks of Humbrol enamel paint which does touch up work fine, readily available in hobbycraft etc and I mix to get as close a colour match as I can. The model makers masking tape they sell in there is good quality too.

[mrcharly-YHT]

I normally just use nail polish!

This, but matt would be difficult to achieve. Is there such a thing as matt nail varnish?

Clear will protect the frame.

[phantasmagoriana]

I normally just use nail polish!

This, but matt would be difficult to achieve. Is there such a thing as matt nail varnish?

There is indeed! I've got some matt black stuff for one of my bikes.

[drossall]

I got matt black touch-up paint from Halfords for my Brompton.