Randleman,
Suggest you look at www.epoxyproductd.com , they sell a product called Calvins Crack Sealer. It really works. I use a syringe with a small neelle to apply the sealer. It works by capulary action. Paul Oman who ownes the company also suggested using very thin epoxy to seal the cracks before refinishing to avoid bridging the cracks. If not filled the cracks will return.