aluminium corrosion

I have removed the body cappings on my 90 to get them galvanised. The ally
underneath is a white and powdery. Whats the best way to treat this before I
put the cappings back on.
Thanks
Richard

Replace it or patch it, Once its gone its gone,


--
Larry
Series 3 rust and holes



"Richard" <[email protected]> wrote in message
news:[email protected]...
> I have removed the body cappings on my 90 to get them galvanised. The ally
> underneath is a white and powdery. Whats the best way to treat this before
I
> put the cappings back on.
> Thanks
> Richard
>
>
>

Richard wrote:
> I have removed the body cappings on my 90 to get them galvanised. The ally
> underneath is a white and powdery. Whats the best way to treat this before I
> put the cappings back on.
> Thanks
> Richard

Brush it down with a wire brush to get rid of all the powder. You might
want to dig it out of holes with a screwdriver or similar. The treat
with etch primer, maybe two or more coats. Follow with ordinary primer
and top coat. You won't see it so the colour doesn't matter; use up all
those old aerosols from cars long gone! It won't look pretty but in my
experience it will stop further corrosion.

It might also be worth painting the inside of the cappings so as to
minimise the chances of metal to metal contact, which is where the
corrosion occurs.

Gordon

sounds good. thank you.
Richard


<[email protected]> wrote in message
news:[email protected]...
>
>
> Richard wrote:
>> I have removed the body cappings on my 90 to get them galvanised. The
>> ally
>> underneath is a white and powdery. Whats the best way to treat this
>> before I
>> put the cappings back on.
>> Thanks
>> Richard
>
> Brush it down with a wire brush to get rid of all the powder. You might
> want to dig it out of holes with a screwdriver or similar. The treat
> with etch primer, maybe two or more coats. Follow with ordinary primer
> and top coat. You won't see it so the colour doesn't matter; use up all
> those old aerosols from cars long gone! It won't look pretty but in my
> experience it will stop further corrosion.
>
> It might also be worth painting the inside of the cappings so as to
> minimise the chances of metal to metal contact, which is where the
> corrosion occurs.
>
> Gordon
>

[email protected] wrote:

>
> Richard wrote:
>
>>I have removed the body cappings on my 90 to get them galvanised. The ally
>>underneath is a white and powdery. Whats the best way to treat this before I
>>put the cappings back on.
>>Thanks
>>Richard
>
>
> Brush it down with a wire brush to get rid of all the powder. You might
> want to dig it out of holes with a screwdriver or similar.

If you have a sand blaster - that works very well to get back to bare metal.

> Then treat with etch primer, maybe two or more coats.

I have found that Bondaprimer works very well on bare 'aluminium'.

> Follow with ordinary primerand top coat. You won't see it so the colour
> doesn't matter; use up all
> those old aerosols from cars long gone! It won't look pretty but in my
> experience it will stop further corrosion.
>
> It might also be worth painting the inside of the cappings so as to
> minimise the chances of metal to metal contact, which is where the
> corrosion occurs.
>
> Gordon
>