carbon fibre matt finish

[02gf74]

I have carbon fibre mountain bike frame that had a couple of scrapes. I used fine wet n dry followed by polishing compound to remove them.

Unfortunately the rest of the frame is a matt finish so the part I polished (top tube) does not match, hence the question of how to make the surface matt?

Two options that spring to mind; one option is to use a matt clear lacquer and second is to blast it with very fine media such a bicarbonate of solder. The blasting appeals more as it obviously is quicker and means there will be no overspray but the frame has thin walls so I do not want to risk damaging it by the blasting. Also don't want the surface to end up porous so that it holds in dirt.

 

[itscervo]

Scotchbrite

 

[ishaw]

Light use of a scouring lad to take the shine off?

 

[KermitGKona88]

Light use of a scouring lad to take the shine off?

'A scouring lad'

Now there's an idea

 

[ishaw]

Every good home should have one.

 

[hamster]

Whatever you do be careful about breaking through the lacquer. It is important to maintain it: firstly it acts to protect the epoxy matrix of the CF from UV degradation, secondly it prevents moisture travelling up the fibres which can lead long term to delamination.