Sandblasting/ Rust Removal

I am trying to remove the rust around the rear window on my Corvair. Most of
it comes off fairly easily. However, there are some black hard spots of rust
that will not come off. These are in areas where there are pits and rust
through. I can chip some of it off with a punch but it does not get it all
and there is too much to do it this way. I have used all purpose sand from
the hardware store and "Kleen Blast" with pressures up to 110 PSI.

Should I try another type of blasting media? A chemical? I really want to
have all gray metal before painting so I know that it is a good job.

While we are on the subject, what is a good way to fill the pin holes and
pitting? None of the holes are bigger than about 3/16". I suppose that
welding would be the best way, but this would be way too much work.

Thanks four your help,
Scott

On Mon, 9 Oct 2006 21:40:34 -0700, "Scott Buchanan"
> wrote:

>I am trying to remove the rust around the rear window on my Corvair. Most of
>it comes off fairly easily. However, there are some black hard spots of rust
>that will not come off. These are in areas where there are pits and rust
>through. I can chip some of it off with a punch but it does not get it all
>and there is too much to do it this way. I have used all purpose sand from
>the hardware store and "Kleen Blast" with pressures up to 110 PSI.
>
>Should I try another type of blasting media? A chemical? I really want to
>have all gray metal before painting so I know that it is a good job.
>
>While we are on the subject, what is a good way to fill the pin holes and
>pitting? None of the holes are bigger than about 3/16". I suppose that
>welding would be the best way, but this would be way too much work.
>
>Thanks four your help,
>Scott
>

I guess you didn't like our other answers, so the only other advise I
can give is that it is not possible, and you should give up.

It only takes about 5 seconds to weld up a 3/16 hole. Use a brass
dolly behind the hole, TIG or MIG at low heat with .025-.030 wire,
hammer while hot and grind smooth. Of course it sounds like you've
made up your mind its too much work. Maybe some bubble gum to fill the
holes then roll it with latex house paint. Or take it to someone that
knows what they're doing and get it done right.

On Tue, 10 Oct 2006 08:26:27 -0400, PeterD > wrote:

>On Mon, 9 Oct 2006 21:40:34 -0700, "Scott Buchanan"
> wrote:
>
>>I am trying to remove the rust around the rear window on my Corvair. Most of
>>it comes off fairly easily. However, there are some black hard spots of rust
>>that will not come off. These are in areas where there are pits and rust
>>through. I can chip some of it off with a punch but it does not get it all
>>and there is too much to do it this way. I have used all purpose sand from
>>the hardware store and "Kleen Blast" with pressures up to 110 PSI.
>>
>>Should I try another type of blasting media? A chemical? I really want to
>>have all gray metal before painting so I know that it is a good job.
>>
>>While we are on the subject, what is a good way to fill the pin holes and
>>pitting? None of the holes are bigger than about 3/16". I suppose that
>>welding would be the best way, but this would be way too much work.
>>
>>Thanks four your help,
>>Scott
>>
>
>I guess you didn't like our other answers, so the only other advise I
>can give is that it is not possible, and you should give up.