First time users of gel coat can come across many problems with applying the gel coat. We will be doing a series of posts that describe the different issues and remedies for the various issues. Edit PROBLEM CAUSE SOLUTIONS OR ITEM TO CHECK FOR Dull or soft spots at random . ... . . Gel coat uneven Poor breakup; use three passes. Catalyst poorly mixed into either gel coat and/or laminate Mix catalyst thoroughly or make equipment adjustments for good catalyst mix. Trapped solvent in gel coat and/or laminate Equipment surging in material pump and/or atomizing air. Improper catalyst settings (high or low) Trapped water in gel coat and/or laminate Gun held too close to mold. Check cleaning procedure. Check catalyst level with equipment using solvent reduced catalyst. Insufficient catalyst Drain lines and correct the problem. Confirm correct catalyst concentration.