Preparing a machined block for paint and assembly...

[VAGslag]

I'm about to start assembling a vr6 engine for a high-power turbo build... The block has been over bored/honed and decked, but has not been cleaned since it was machined.

What's the best way to clean the block to make sure there's no unwanted material left over from machining? And what would then be the best way to prep the block for paint?

TIA