If your wood door has an old paint finish or other kind of varnish that you want to remove there are a couple of options.
Varnishing 6 panel doors.
When using varnish it is important that you use a high quality paint brush that will prevent runs and lines from forming in your finish.
Allow each coat to dry and rub down the door between coats with fine sandpaper to.
When varnishing a door start at the top and varnish in stages down to the bottom of the door unless you are varnishing a panelled door in which case varnish the panels individually first from top left to bottom right before varnishing the centre vertical panel the cross rails from top to bottom and then the outer edges.
On a flush door simply start varnishing at the top and work your way to the bottom.
Step 6 allow to dry.
Allow the first coat of varnish to dry overnight.
Remove old paint or varnish.
Step 5 apply varnish.
Hi my name is wayne de wet this is how i paint 6 panel doors with dulux trade trade oil based pure brilliant white satinwood.
Or you can use chemical strippers to remove the layers of paint.
Steps to applying varnish on doors.
For a panelled door varnish the panels in the order shown to obtain the best finish.
You can sand the old varnish off a very time consuming task.
It must be completely dry before you begin sanding.
Apply the varnish to your door in long even strokes in the direction of the wood grain.