Having been looking at fireplace mantelpieces I am finding that in the
style and price range I'm looking at the majority seem to be rather
simple affairs made out of sprayed MDF so I've decided to try my hand
at making my own.

The design and construction of the mantel should not be a problem
however I would like a super-smooth white finish (no brush marks) and
figured my best bet to achieve would be spray painting. Based on this
premise, I have a few questions:

1. Will spray cans from the likes of Plastikote suffice? (e.g.
http://www.plasti-kote.co.uk/Product/pcode---4181) Depending on the
success of this project it could well be a one-off so is the
alternative expense of a compressor/gun justifiable?

2. The use of MDF will presumably absolutely priming - I do have a tin
of MDF primer but will my desired super-smooth finish be compromised
by applying said primer with a brush? Alternatively, Plastikote do do
a spray primer if that would likely be better?

3. Will undercoat be required?

4. It was my intention to go for a Satin finish on the basis that this
would give me some of the shine of gloss but the surface forgiveness
of matt?

5. Any tips or things I should be aware of?

Sorry for all these questions, but if you can help steer me on the
right path it would be appreciated.

Mathew