Revarnishing cabinets & doors

[bille]

I'm doing up a unit and the kitchen cabinets and a screen to hide the fridge are varnished Jarrah veneer on particle board.

I have washed all veneer surfaces with sugar soap to remove any grease and given a light sanding with steel wool.

Now I need a bit of advice about applying a clear satin coat.

1. Do I need any further preparation?

2. I would prefer to apply with a cloth to get a furniture look finish.

Any advice appreciated.