"JW" wrote in message
om

I am totally new to woodworking and I am thinking of building an
inexpensive wall cabinet out of cheap MDF boards.

Say no more; find your way over to uk.d-i-y. Anal retention is not
rquired there. Also the chat is actual hands on stuff not stuff on
hands.

My questions a
1. Is MDF boards strong enough to be used in a wall cabinet? Can it
even hold it's own weight? Or should I add some real lumber as
reinforcement?

Any shelf needs support at 3 foot intervals for a section 1" thick. MDF
has been used for a long time now. It is common on stair risers for
example and the beloved media of house make-over programmes on the TV
over here

2. What is a easy way to join boards at right angles? Can I simply use
screws, glue and wood filler to patch the hole?

Space some strips on each side piece to set the shelves on. Put them
tight to the back and stop them short of the front and cut the front
edges of them at an angle. MDF has to be pre-drilled for screws and a
countersunk bit used to bury the head of the screws. Over here in the UK
the trade named filler is Pollyfilla. Any wood filler will do. Follow
the instructionson the packet.

3. When you paint the boards, do you need to use a primer first ?

Yes. Acrylic then undercoat then gloss if that is what you want for a
finish. It will look OK with 2 or 3 coats of acrylic.


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