15 The last bit of advice we can pass along is when in doubt, ask a professional. You can head over to your local paint supply store and talk to the guys behind the counter. Another option is to call a tech line like Finish Master's nation line (800/233-9133) or the tech line of the products you are using. Last and certainly not least is the Internet. DuPont has a great paint defect solutions guide in the troubleshooting area of its website (http://pc.dupont.com/dpc/en/US/html/visitor/b/dr/s/trouble/home.html) that addresses just about any paint issue you might be having and offers a cure in easy-to-understand terms.