Pocster

@SteamyTea not trying to remove cement from quoins / copings . Just deeply embedded dirt / pollution.

As you say . Don’t want to damage the stone . Also environmental trying to avoid acid and bleach .

Will try the LithofinPower-Clean as recommended by @PeterW Reluctant to use acid unless I really have to and equally the same with bleach .

Yes . They do go black . Real black some of them ; so technically it’s “dirt” from pollution ????

Acid on random stone is good . But what should I use for the quoins / copings ??

Tried now both products on the quoins - no real joy . On eBay I see ‘ memorial head stone cleaner ‘ 🙄🙄🙄😁

And he still can’t pull the birds !

Are you fit now ?

This stuff was good on the random stone . 1 : 4 mix with water at first . Always scared the acid will burn the entire wall away ! . Went over more stubborn bits later with it neat . Does the job 👍 Says not to use on sandstone. So tried my favourite ‘ wet & forget ‘ on them - jury is still out . According to the reviews you need to leave it and be patient…

Which ever face is cemented between my legs

You can just about see it in the photo . Too be honest if the power failed / cut off though the 20kg drill wouldn’t fall on your head it would swing straight into your face …

Hang on a minute . Is THIS the first ( only ) job you’ve actually finished ??

Yeah it does have a 'cap' you fill with something oil based and is then fed to the tip. Amazon messed around with the oil delivery i.e. it never happened. Presume it's noting special. I just stop every 30 seconds and shoot some wd40 in the hole.

Guns are bad for you

It’s strange how ‘ surprised’ I am that the electro magnetic works !!

New toy alert !! Cooooooorrrrrrr . Makes drilling into steel easy . Must remember to disconnect power when SWMBO is standing under it .

I’m fairly certain the manufacturers intention isn’t to wait a few thousand years to ‘cure ‘ . They easily chip / scratch as I install them .

I know . Tbh this part of the wall I really don’t care about . Apparently the grout ( which they forgot to supply ) matches the copings . So in theory joins look less obvious. This wall ( and lane ) were the most contentious issues during my planning ….. so (expletive deleted) ‘em

I’ve looked at this . 40mm tiles - which limits choices somewhat . So instead I’m going for ‘ plastic ‘ type recycled decking .

You mean Sbr and cement ? No sand . So like a yogurt type paste ?

Out of interest these stones seem very soft I.e scratch , corners chip quite easily . Documentation that came with them said to leave outside in damp conditions to cure ( which they have been ) . How long should they take to cure ? ; I assume ( hope ) they do eventually go rock hard ???

I think there’s a complement in there somewhere ….. All ready anticipated final coping not fitting . Will have to cut to suit and ‘somehow’ have my wall and copings ‘blend’ into the original wall and coping .

If it wasn’t for this forum I’d just stick expanding foam under them and be done with it 😁

Well ; it’s nice and level . I do like my rebar method and will use that principle again on the front . I will bed the copings in a very thin cement mix with Sbr - so I don’t get any abuse .

The problem as as you say they could just be sat on the packers not even bonded to the base .