Hi Hiniguel - just to report that I ended up washing the yayo - it was a real intensive wash using acetone, ether and water - not all together!
I start off by using acetone, anhydrous (with no water in there) and that gets a few cuts of the mix.
The coke is put into a lab filter, into a smal funnel and acetone poured over it. Then the filter is pressed to absorb what acetone is left there, its dried on a radiator and that leaves what looks ike cocaine off the block.
The coke is then crushed up, best to put the coke in a bowl and use a teasppoon to crush it up to a fine powder.
Then its the ether. Coke dissolves in ether, other things don't. The coke is put in a filter and the ether dissolves the coke. It then has to be evaporated, simply using a bowl and radiator.
Then scrape up the coke when the ether is evaporated, you need to use a razor as the coke sticks to the bowl. You will see a layer of what looks like glass. Scrape it all up!
Then, its a simple water wash. I use distilled water. 10ml or so dissolved the powder and dripped through the filter. I added another few m to get whatever was on the filter. Some residue was left in the filter so I'm glad I used water also.
An overnight dry and the result looks like nothing! The coke is almost see through until you scrape it up with a razor. Then we see the coke looking the colour of pearl! It will dry out quite quickly but at first its gloopy and wet.
The result was a coke that was up there with the best!
The loss was a bit higher than I'd iike but I've seen worse. You cannot make a bad coke better via washing.
I tried two tiny kiddy lines, smooth as silk and euphoric with no urge to bang more ten minutes later.
So, although I lost a bit of volume - what I have is so good that 100mg would be more than enough for me. Its on a par with the Sukey UCC (uttra clean coke) you cannot feel it going up. I was surpised at how good it was after the wash.
Most coke ought to be washed IMO - but few people seem willing to pay the price for it when vendors do offer it. Few customers wash coke, shame really as those really nice cokes you get - when washed, are fantastic.
Anyhow, thought I'd let you know. The coke I have now is one that I'm more than happy with. Wish I had more of it but got more on the way for a big party next week! 
I do love a party.
I'm sure the usual batch of Peruvian would not lose as much in a wash so I look forward to that.
Comms from Hiniguel are excellent also.
Red.
Have you received my sample mate?

Also have you been on 'The Hub' yet? Your extensive reviews are needed there!