2004 Ski-Doo Elite Factory Service Manual, Page 299Get this manual
Section 10 BODYFRAME Subsection 01 (BODY)
A blister is visible bump on the body surface that may not necessarily come right through the gelcoat layerIn the case of only few blisters, follow the same repair procedure as for air bubblesIf they are numerous and in close concentration, spray liquid gelcoat to achieve proper repairThis procedure is covered in Minor Gelcoat Fractures