Any coin enthusiasts ?

[Mad Doug Biker]

In the charity shop I work in now, a load of old coins have come in. Most are old Half Pennies, some foreign things (including a Palestinian coin), but by far the oldest is a 1754 George II Penny (I think).

Unfortunately, it's quite dirty and worn.
I want to clean it and see what we have, but I want to do it properly.

What do you think?:

 

[Mad Doug Biker]

5 MILS, 1939, Palestine:

 

[Mad Doug Biker]

In fact, how best to clean any coinage?

 

[BigSid]

In fact, how best to clean any coinage?

For gold and silver (and maybe other metals) GoldDiggerDave on The Silver Forum might be worth contacting.
https://www.thesilverforum.com/topic/65657-coin-conservation-services/#comment-704865