Hi PD's.......
I like the combination of shot blasted finish + machined brass..

....so posted a question to Winfried & here is his response...which is interesting as it is simply grit blasting followed by a lashing of WD40........
A search on the
http://www.selva.de/product_info.php?cPath=Werkstatt&sPath=Elektrowerkzeug&products_id=Sandstrahlkabine%20381306 ...on Grit Blasting provides a 229 EURO BoHler machine....which appears good value...................

BÖHLER Sand blaster
For cleaning, matting, paint-removing, restoring or aging of all types of surfaces. Results in a clean, even finish.
The system works without compressor but with a vacuum provided by any common household vacuum cleaner. This system has been developed specifically for model building to be able to work precisely on small parts with fine detail. The vacuum within the housing draws the blasting material and blows it - depending on the amount of suction provided by the vacuum cleaner through the jet pipe onto the work piece.
Two openings in the side and one in the top of the cover provide access for the jet pipe as well as a special tweezers for small parts. The grit can be re-used after filtering it through a sieve (included). 1 liter of Asilikos grit included.
Overall size 43 x 35 x 28 cm, working area 26 x 15 x 22 cm
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----- Original Message -----
From: Winfried Niggel
To: Derek L Warner Pty Ltd
Sent: Sunday, June 08, 2008 8:41 PM
Subject: Re: Surface Finish of rmodellbau-niggel.de Brass Components
Hallo Derek,
meine Teile werden nach dem Löten sandgestrahlt mit diesem Gerät von SELVA mit Asilikos-Strahlmittel.
http://www.selva.de/product_info.php?cPath=Werkstatt&sPath=Elektrowerkzeug&products_id=Sandstrahlkabine%20381306danach sprühe ich die Teile mit Öl WD-40 ein.
regards Winfried
----- Original Message -----
From: Derek L Warner Pty Ltd
To: Winfried
Sent: Sunday, June 08, 2008 11:47 AM
Subject: Surface Finish of rmodellbau-niggel.de Brass Components
Hallo Winfried, ........., das ich sehe in Ihre Webseiten….viele Ihrer hergestellten Bestandteile haben, was ich bin ein Korn gesprengtes Ende… vielleicht mit Plastikschuß annehme Mein Öler hat gesessen, hier für einige Monate aber kein Zeichen der Oxidation auf der Messingschuß gesprengten Oberfläche zeigt Ich mag die Kombination des Schuß gesprengten Endes + maschinell bearbeiteter Messing,…, das ich meine anderen Dampfbestandteile mit einem Ähnliches Korn gesprengten Ende beenden kann…, aber gibt es alles ich tun kann, um das Oberflächenende zu konservieren, wie Ihre Bestandteile tun? Respekt Derek
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Hi Winfried.........I see in your WEB pages....many of your manufactured components have what I assume is a grit blasted finish...possibly with plastic shot
My Oiler has been sitting here for a few months but does not show any sign of oxidation on the brass shot blasted surface
I like the combination of shot blasted finish + machined brass...I can finish my other steam components with a similar grit blasted finish...but is there anything I can do to preserve the surface finish as your components do?
regards Derek