I have seen guys use duct tape but I wouldnt try it . I am a Suncure fan I have had some realy good results with it . With any board repair the repair is only as good and the Prep work and sanding. Poor prep and the repaire wont hold . Poor sanding and it will look like poop.
put a sticker on top of it or duct tape. DO NOT FILL THE HOLE WITH WAXX!!!! it makes dealing with a small ding much more like dealing with a pain in the ass ding. If you use suncure use it only temporarily, suncure is actually somewhat porous and will allow water in.