Plane or trim a doorskin door?

I have a six panel doorskin door in the basement. It doesn't fit or close. I suspect the door frame has warped. I need to remove up to 1/8" from the bottom 18'' of the door. This door has a compressed paper edge top to bottom which is painted.
What is the best way to trim this door? Will a plane work? Table saw? Circular saw? Other?
Peter.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
If it doesn't fit at the bottom, you need to remove more than 1/8" as doors normally have 3/4 to 1" gap at the bottom unless it separates an unheated/cooled area, then it needs weather-stripping on the bottom. By the way, how does a door frame warp as they are normally nailed solidly in place and made of well dried wood. A warped door frame wouldn't require material removed from the bottom but more likely from the sides.
If you have a very sharp plane, you could remove 1/8 of any edge. To remove 3/4" to 1" from the bottom I would use a hand held circular saw with a quality blade and a guide clamped on the door to ensure the cut is straight and where you want it. Never try to trim the end off a door on a table saw unless you are using a trim sled, this can be very dangerous.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
The door does not fit at the side. The bottom gap is about 1". I need to remove from zero to 1/8" from a side, from the bottom up about 18". I shall try the plane idea with a very thin cut.
The builder did not put quality into this basement. I have tried correcting the (twisting) warp at the bottom of the frame but I run the risk of splitting. I have attempted to stabilize the warped frame with extra fasteners so that further warpage is unlikely.
Many thanks for your advice.
Peter.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.