Marking out

[Speedy Builder5Participant @speedybuilder5]

Perhaps I am late to the subject, but I have just discovered a convenient marking out medium.

Pentel Stylus correcting pen  (other brands are available).  It conveniently can draw lines about 0.5mm wide in white on most surfaces including rough castings.

[Nigel Graham 2Participant @nigelgraham2]

Good idea – thankyou for that!

When I have a large area of fairly rough steel, such as hot-rolled plate, to mark out, I sometimes clean it then sprayed it with ordinary light-coloured primer.

That will take a pencil to sensible accuracy, and once features like the edges have been been cleaned up it becomes possible to mark out to finer limits, or to machine from datum edges.

The remaining metal then has a lightly painted surface to help protect it in storage.

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