Tips on cleaning up A500 RF Shields...

ElectroBlaster · 23 August 2012, 17:45

RF shields in old Amiga 500's start to rust or dull over time. Anyone got some ideas on how to clean them up without resorting to drastic measure or getting too nasty with wet n dry sandpaper? Or will I have to spray or coat the surface afterwards?

bdb · 23 August 2012, 20:33

You can reduce the oxides back into a metal with Silver Polish. It contains sulfer compounds for this purpose. Acids will dissolve the rust, removing the metal.

Your best result would be with silver polish and a buffer (Dremel has one), but to prevent future oxidation you need to prevent oxygen and moisture from reaching the metal; oil provides a temporary solution, but polyurethane coating is more permanent.

ElectroBlaster · 24 August 2012, 01:18

Thinking I had some Brasso hiding in the cupboard but I must have used it

I shall get some silver polish asap.

lost_loven · 24 August 2012, 01:28

Toss it out! Its always in the way

lost

Jope · 24 August 2012, 07:55

Classic coke + tin foil, but that eats the metal as said before. :-)

keitha1200 · 24 August 2012, 11:45

I'd probably just 'chuck-it' also, but you could buy some rust eater, sandpaper and some brush-able paint.

You'll be looking something under £10 for the above items.

ElectroBlaster · 24 August 2012, 15:34

I used to just rip and chuck them myself! but that was back in the old days.

The thing is now I want to keep/make a decent a500 with all the original bits where possible.

Im already happy to find I have a rev6 board, just have to confirm if is dead or not (hoping its alive) as I havent even fired it up yet.

23 August 2012, 17:45	#1
ElectroBlaster Junior Member Join Date: Mar 2002 Location: Exeter, Devon, UK Age: 49 Posts: 1,706	Tips on cleaning up A500 RF Shields... RF shields in old Amiga 500's start to rust or dull over time. Anyone got some ideas on how to clean them up without resorting to drastic measure or getting too nasty with wet n dry sandpaper? Or will I have to spray or coat the surface afterwards?

23 August 2012, 20:33	#2
bdb Registered User Join Date: Jul 2012 Location: USA Posts: 239	Reduction vs dissolution of iron oxides (rust) You can reduce the oxides back into a metal with Silver Polish. It contains sulfer compounds for this purpose. Acids will dissolve the rust, removing the metal. Your best result would be with silver polish and a buffer (Dremel has one), but to prevent future oxidation you need to prevent oxygen and moisture from reaching the metal; oil provides a temporary solution, but polyurethane coating is more permanent.

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24 August 2012, 01:18	#3
ElectroBlaster Junior Member Join Date: Mar 2002 Location: Exeter, Devon, UK Age: 49 Posts: 1,706	Thinking I had some Brasso hiding in the cupboard but I must have used it I shall get some silver polish asap.

24 August 2012, 01:28	#4
lost_loven Registered User Join Date: May 2007 Location: winnipeg Posts: 358	Toss it out! Its always in the way lost

24 August 2012, 07:55	#5
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,863	Classic coke + tin foil, but that eats the metal as said before. :-)

24 August 2012, 11:45	#6
keitha1200 Registered User Join Date: Feb 2012 Location: Tayside Posts: 181	I'd probably just 'chuck-it' also, but you could buy some rust eater, sandpaper and some brush-able paint. You'll be looking something under £10 for the above items.

24 August 2012, 15:34	#7
ElectroBlaster Junior Member Join Date: Mar 2002 Location: Exeter, Devon, UK Age: 49 Posts: 1,706	I used to just rip and chuck them myself! but that was back in the old days. The thing is now I want to keep/make a decent a500 with all the original bits where possible. Im already happy to find I have a rev6 board, just have to confirm if is dead or not (hoping its alive) as I havent even fired it up yet.

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