Originally posted by Dimal
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ECM Giotto Premium not working - restoration attempt
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So I have totally taken the machine apart and there is a bit of damage to the chassis. I got a quote for powder coating but it was bit more than I was currently willing to spend so I had a crack at doing it myself. Make sure you wear a dust mask as it makes a mess and gets everywhere.
Main Chassis

Underneath

Stiffener

Behind the front stainless panel

After stripping the paint, you can see some corrosion damage, this is under the water tank receptacle. All other corrosion was superficial.

After painting, ready for a bake

In for a bake to cure the paint.
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You can powder coat at home but unless you're doing a lot of parts it may not be economical. There's places like this who sell the supplies needed (The bay of evil is of course also another source.
). Here's a page laying out how to do it (The page came from the supplies site linked above but has since been removed it looks like.). These are of course just some quick examples of places for supplies and instructions, there are many others out there including some closer to home I'm sure. 
Java "DIY what?" phileToys! I must have new toys!!!
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To be fair, the quote I got was $120+ GST. Which I wouldn't consider excessive if you have something you really want to protect. If you do the sand blasting yourself you might save some more if they let you.
I paid about $10 for the wire cup and $17 for the paint. If was doing a proper job I would have use a high build zinc rich primer, but in reality, it is not a very tough environment, so as long as the paint sticks, it should be good. I did sikaflex the stiffener joins, as I think that is the only place corrosion could do some proper damage.
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Having some very frustrating issues with the control board. I get voltage across the 16A relay but no heating. I have direct connected the heating element to 240v and it works. I've got the pressurestat and Thermo switch bridged out until I can figure out my problem even though they work.
I did take the opportunity to check how the boiler goes with a bit of pressure and it held up fantastic. A few seals to replace and that's it. I've sheared off the threads of the Thermo switch because i was a gorilla when a light touch was needed.
I'll pop up some more photos soon
Thanks
vovo
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So i have had a good attempt at descaling the boiler and tubing downstream of the boiler. This involved multiple attempts of mixing descaler with boiling water and filling the boiler and soaking a few fittings in solution. The fitting threads were pretty badly scaled so I attacked those with a wire brush. The fittings have all cleaned up very well, but the boiler is not yet complete. I will run a descale through the machine once I get it all working again. I definitely needed to take it apart to clean up the fittings and tubing though.
Also thanks to the internet, I have cleaned up the front stainless panel with some bicarb and then polished up the panel with flour.
As you can see the boiler has cleaned up a bit but still has a bit to do, but it is hard to keep the boiler full without it being all connected and I didn't want to just drop it in a bucket as I am not sure what the coating is on the outside.

Fittings reconnected to the boiler. I need a few washers to seal up a few as the existing copper washers are not reusable, but I am putting together a list to complete the restoration in one go once I have confirmed it works properly.

Pump and wiring reconnected to the chassis, I am a bit disappointed that the rust remover has caused such an uneven substrate that it can be cleary seen where it was used under the paint. You can see it bottom right.

Here is the front, all cleaned up and polished, I have lost the I/0 symbols around the power switch which came off during cleaning.
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Looking good there "vovo"...
The plating on the outside of the Boiler is most likely Tin(Sn) or Nickel(Ni) or a SnNi alloy coating. Both are used and look similar. Nickel is not usually used for the inside though, can leach into the water under certain circumstances...
Mal.
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