I've Done It
First, build a heavy duty "saw horse" for the stern to rest on. Measure the height from the ground to the hull bottom at the stern first. Built mine out of 4 x 4s and 2 x 6s. Now, slide the "horse" under the edge of the stern, where it is the stongest. Then, crank up the bow end of the trailer. The boat will raise up, but you have to brace the hull forward with lengths of 4 x 4s. Now crank the trailer down. There will only be about 2 -3 inches of space between the hull and the boards, but just enough to get a paint brush in. Be careful. Brace the trailer wheels so nothing moves. I did this two years ago, so hopefully I've remembered the procedure correctly. If I missed a detail, I apologize. Just think about every move before you do it! Good luck!