I'm with Greg on using the OCW. The WAUD product is OK as a carnauba enhancer, but it's not going to keep a sealant going forever.
In fact, nothing will keep your sealant intact forever as you will pick up paint contamination over time. Contamination/fallout will eventually develop that will eat thru or stick to the top sealant layer and if you keep layering you will just trap more junk inbetween the layers. I know, however, that some do like to spot clay between layers and this does some to work for them as a way of extending the sealant's life.
If you want a sealant to bond well to the paint, you need to start with a clean surface eventually. Strip everything off at least every 6 months and probably do a clay/polish before you start sealing again.