Head to Wal-Mart or any other store with a large craft section. Look for magnetic sheets in the sizes large enough for whatever emblem you are looking to apply. Use some high quality double sided tape and use this to adhere the emblem to the magnetic sheet. You can also use a permanent adhesive - it's up to you.
Once all of this is mounted, use a sharp #11 Exacto knife blade to trim around the emblem. Once you are satisfied with your trim job, just stick the emblems wherever you want them. The magnetic sheet will be more than strong enough to hold the emblems on.
Upsides? Plenty! You can remove the emblems to wash and wax and can adjust the position of the emblems at will. No downsides.
DucatiRdr FTW!!!!!!!!!