Rusty Coffee Grinder - Restoration

In today's episode we will show the renovation of a small metal mill of the Italian company Tre Spade whose base has a ground plan
3.39 x 3.39 inches.

Something about the history of coffee grinding
 
Initially, the coffee beans were crushed in mortars, or milled in stone grinders to fine powder. Only later, various small and large metal stone grinders were produced. During the First World War, soldiers bought only internal movements for price reasons and then made their own packaging from used ammunition. These models can still be found in collectors' collections.

  In the past, practical tools for day-to-day use are more like decoration.
If you have any information about coffee grinder and companies that made them (period brochures, ads, model names, years of production), you can share them with others on my facebook site:
https://www.facebook.com/groups/951735661652138/

If you have any questions about the process, use machines or other things, ask me in the comments. I try to answer everyone and as soon as possible.

I'm sorry for my bad English, it's not my language.
I'm uploading videos about recovering mechanical things. I'm uploading videos about restoring old wooden things.
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action index:

00:01 Shipment arrived :)
00:18 Oh yeah beautiful Italian mill from Tre Spade
00:19 Resetting the coffee grinder
01:03 I started by removing the door handle so that the wooden hand did not break in the caustic bath.
01:28 Prepare a container into which we put the whole grinder. Pour in sodium hydroxide (caustic soda) (used in households to wash basin traps) and pour in hot water. I just want to draw your attention! Protective equipment must be used as caustic is caustic!
02:05 While we grind the grinder we grind the wooden knob of the grinder handle. I used sandpaper on grave P180.
02:22 After 24 hours of brewing, pour the used liquor off.
02:45 Pour clean water into the prepared container to clean the paint disturbed by lye.
03:20 Barba with a brush goes down beautifully :)
03:35 After the grinder has dried, grind off the rivets connecting the bottom container with the grinder body. And then we dismantle the other parts.
05:28 I cleaned the individual parts with a steel brush and to clean up inaccessible places with a metal wool.
07:35 We insure everything by applying a rust remover with tannin, which will make us a metal patina.
08:39 Clean the remainder of the dried rust remover with a light metal wool and apply graphite to moderate the color.
10:44 After re-riveting we assemble a grinder.
13:43 To emphasize the shape of the grinder I used silicone - acrylic silver color and lightly soiled with a dry brush.
14:59 Demonstration of functionality.
16:16 Comparison before and after renovation.

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Видео Rusty Coffee Grinder - Restoration канала Veradona Restoration