I'm always so happy when a client books in for an arm wax... not!
I have tried pretty much every way BUT as I don't get asked for it very much I haven't really perfected it. However, my
new way is to start with the client lying down, arms above the head (sim. to underarm) and wax the entire area
that I can see from that position. Then I sit them up, put couch roll over their lap in case of drips, and hold the arm, gripping / stretching from underneath and just work methodically over the whole area. I think with waxing it is absolutely key to be methodical and have a good check at the end for any missed bits.
I find arm wax clients can be the most fussy, I don't mean that in a nasty way, but often arm wax clients don't really need it doing (imo) so the fact they think they need it doing means they are sensitive about the hair, and particular about the result. One thing to watch is where to stop, so that you don't leave a tide mark, for instance... on a dark haired person if you wax the entire arm you can make the back look hairy, so you need to blend. A suggestion I have read (prob. posted by Andy!) is to use a used wax strip that is already sticky to thin out the tide mark area, as it will kind of pull half the hairs out rather than all of them, therefore softening the line. (Sorry Andy, if I have not explained this well!)
The other things is, I personally find it takes me ages. Not sure how long they allow for it in a salon but it's fiddly and (I hate to admit this) I would probably allow an hour, just in case
Lastly, and again this is a tip I got from someone else, you must include the hands and fingers...
but not ask the client if they want them doing, as this draws attention to the 'problem'.. simply do it as a matter of course
Hth's, Zoe x