Making some large Moulds ( 2.5m x 2.5m ) at the moment and this unusually hot weather is really slowing me down. Even at .75% I can only mix 5-600grms of resin at a time, giving me about 10 minutes before the stuff starts to gel in the pot. I have now started mixing 4 or 5 batches in tray like containers and putting them in the fridge before use. This is helping but has anyone else developed any cunning solutions? 

Slow MEKP:
http://www.ecfibreglasssupplies.co.uk/p-2490-catalyst-slow-reactivity-mekp.aspx

Or really slow MEKP:
http://www.cfsnet.co.uk/acatalog/Low_Fizz_Catalyst.html

better do for me infusion i do for you any polyster

If you're ordering both, order them from CFS. I just linked to East coast for the first one because they are slightly cheaper, but no point in paying 2 lots of postage.

Send me stuff Warren i do for you good molds and you can do for me infusion as that is still for me scary thing. i hope pre preg easier?

what i do is take a painting-tray ,and put a freezerblock under it, then put my pot of resin on top of this and you'll get some precious extra working time

What about an AC'd workshop?