Preperation for Painting

[skov]

Now my chassis is close to completion my mind's turning towards painting.
I've got a 2l chassis pack of Epoxy Mastic 121, the plan being to use a brush and roller to apply it.
The instructions say you just need to clean the chassis with a wire-brush on a drill.
Is there anything else I should be doing to clean it before painting, i.e. should I be degreasing it or owt? (and if so what should I use?)
Whatever preparation I do needs to be something I can do at home without any special tools/equipment, so sand/shot blasting isn't really an option.

Any tips on how to approach the painting itself would also be gratefully received!