Removing paint from logs is no easy task. The video here demonstrates one method.
Painted logs present a problem as described in an earlier post - removing that paint present another problem - how to do it. You can use chemical strippers but this would be extremely costly, take a tremendous amount of time and create an environmental mess.
There have been suggestions of using a high pressure power washer. Forget it. Not only will you be soaking the logs with unwanted water but it is terribly inefficient in paint removal.
You can use a grinder with sanding pads but this is also inefficient as you will go through pads quickly and have great difficulty getting into small areas.
