Updates at last

D'oh URL:

mike

And very good they are too John. Well done.

You mention in the power drills section "if you intend to do a lot of wire-brushing use an angle grinder with an appropriate brush".

I've been looking for a wire brush to fit my angle grinder for ages - anyone know where I can get one?

Dave

Wicks sell a sort of stripper thingie for angle grinders which has the same sort of uses as a wire brush, but rather safer. I use it for paint/surface rust removal on car stuff - it is very quick at that but doesn't damage steel.

Do you mean the 3M disks? I've used those quite a bit - they're great, but they do wear down quite quickly.

Should be widely available, as a "wire cup brush". Google shows lots of examples, e.g.:

N.B. wear eye protection, the wires that break off will stick into your skin so wear thick trousers or whatever, too!

All the usual suspects:

These are effective at light rust etc, and not too aggressive:

Typo in cement faq:

Sulphate Resisting Portland Cement (SRPC) is for underground work, particularly *rwith*

Also the latter half of that para seems to contradict the first bit: "For the UK it is best to assume that this is the case. Rainwater is effectively distilled water and contains only insignificant amounts of sulphate."

Might want to update references to Dejanews to google...

Builders Vs Sharp sand. I had always associated Builders sand with soft rather than sharp...

not read the rest yet, more anon... ;-)

I see I'll have to explain about how rainwater dissolves sulphates out of the soil when it becomes groundwater. Reading through them myself I see a whole load of bits that _still_ need work. London clay, if you go deep enough (>10m) contains the odd gypsum (calcium sulphate dihydrate) crystal.

John Schmitt

Yup, must admit I did not pick up the change of context from ground to rainwater... it would be easy to assume they are equal as well.

The previous rewrites have now been superseded. A whole lot of pytos have been eliminated, weblinks added and further explanation and information included. Could've wasted the weekend on fence painting.

John Schmitt