Are you sure you're scraping wax? Rough white patches are usually where the base is dried out, no wax. Try buffing it with scotch brite, if it doesn't go away the base is dried out. Check your iron temp and make sure you're getting the base warm enough to absorb the wax. It should take 10-20mins to melt in the wax, get it hot enough that it stays liquid for 20-30seconds after you move the iron to a different part of the base. If the base is really dried out, let the board cool then melt the wax in again, adding more wax in places if needed.
Last edited by honeycomb; 02-24-2012 at 02:19 AM.