When I redid the vynil on my duster a couple summers back I found that the vynil didn't take to well to going into the drip rails along the edges of the roof. To help press the vynil into the rails and get it to stick, take the lower alternator bracket from your car (the long curved one, big block or small block, both work) and walk/roll the bracket through the drip rail to press the vynil down. the bracket is just about the right size to do this job. Once you've got one side done and want to move on to the next, make sure you have someone hold down the side that is already done to keep it from coming back up. As for surface prep I just sanded all the adhesive from the prior top off and sprayed some Duplicolor rattle-can primer on it, then scuffed the primer. Used a high-temp upholstery adhesive normally used when upholstering boats. Also make sure you start from the center of the roof and work your way out, and trim oversize at first then do a fine trim with sharp scissors and an xacto blade once the glue has set. Most important of all....have fun!!!
