In reply to adamarchie:
> I got hot aches at the indoor wall at Ratho the other day!
I find that deliberately inducing mild hotaches at Ratho on my first route staves them off for the rest of the session.
Same thing while walking in to a winter route; take gloves off long enough to get mild hotaches in time to warm up again before gearing up.
Also, gear up in stages; crampons, walk a bit, harness, walk a bit, rack up, walk a bit, rope up, climb.
At least two pairs of inner gloves; alternate on pitches keeping other pair warm inside lots of layers of clothing.
Use the warmest belay mitts you can lay your hands on (worn next to skin, while both layers of gloves are rewarmed inside clothing)
Set off on a pitch wearing inner gloves, outer gloves and belay mitts, then remove as you get warmed up and technicality increases (not always practicable). This has the added advantage of often allowing me to do most of the technical climbing in just my dextrous inner gloves.
Basically never allow your hands to get cold (except for the initial controlled "innoculation")
And if your hands do start getting cold, stop and rewarm if possible.
Not had bad hotaches in years.
Post edited at 15:18