[urq] RE : ice blasting + rust proofing

[Schaible, David]

Peace of mind is a good thing........if you do blast it, just use a similar product to recoat it, there is a possibility of using rust conversion stuff with an overcoat of undercoat.  However, I never have had success with anything other than por-15, which is very difficult to get anything else to adhere to.....speaking from experience, a gram of prevention is worth a kilo of corrective action when it comes to rust especially for a non galvanized body.


So.... louis-alain,  you were going to send me vac pump, yes??




-----Original Message-----
From: J H [mailto:milisen at hotmail.com] 
Sent: Monday, January 29, 2007 3:51 AM
To: laraa at sympatico.ca; urq at audifans.com
Subject: Re: [urq] RE : ice blasting + rust proofing

Hi Louis-Alain,

Yes, the underside is coated with a thick rubber like material. I have tried 
to remove this at some spots, and as you say it is very hard a work. With 
the dry ice method this coating is removed in seconds, without any harm done 
to the painting underneath. I had a look at some spots underneath the rubber 
like material, and there is a grey painting.

The reason why I want to remove to  the rubber like material, is that I want 
to make sure there is no rust underneath it. And it is very hard to see 
where there are possible cracks and rust underneath... Also it would give me 
peace of mind to have seen the complete underside :-)

But as you say it also has a sound deadening effect. Hmm, maybe I have to 
re-think the ice-blasting bit.

Cheers,

Johan

Helsinki, Finland





*****Johan, if I'm right, the underside is already coated with a thick
rubber-like product that is very hard to remove. There is no paint
there. You don't have to remove it, just repair where there is rust,
and re-seal with a similar product. There is at least two good reasons
not to remove that stuff: it is very good at protecting the underside
from the road debris, and it has a role as a sound reduction barrier.
Remove it, and you'll regret it as all the stuff projected by the
wheels will hit the floorpan and make an horrible noise.


 >The other choice I was thinking of, is to only have the floorpan
 >rustproofed. With some sort of wax, or oil based material.

*****Wax and oil-based rustproofings are good where water can collect,
like inner door panels, door sills, but are no use for the underside
except to pick up dirt. The rubberlike undercoating is what will
protect the floorpan.

Hope this helps,

Louis-Alain


_______________________________________________
Audifans urq mailing list
Send posts to: mailto:urq at audifans.com
Manage your list connection: http://www.audifans.com/mailman/listinfo/urq
Have an urq question?  Check the Audifans Knowledgebase!
http://www.audifans.com/twiki/bin/view/Audi/UrQuattro
Have an urq answer? ... Please help others by adding to the KB ... all 
contributions welcome!

_________________________________________________________________
Nyexaminerad? hitta jobben här! http://jobb.msn.monster.se/

_______________________________________________
Audifans urq mailing list
Send posts to: mailto:urq at audifans.com
Manage your list connection: http://www.audifans.com/mailman/listinfo/urq
Have an urq question?  Check the Audifans Knowledgebase!
http://www.audifans.com/twiki/bin/view/Audi/UrQuattro
Have an urq answer? ... Please help others by adding to the KB ... all contributions welcome!

______________________________________________________________________
This e-mail has been scanned by MCI Message Labs Anti-Spam and Anti-Virus Managed Email Content Service.



____________________________________________________________________

This e-mail has been scanned for viruses by a Managed Email Content Service.