Possible Clues:

• Often repaired, in an irregular way
• Irregular, but attending church in case of publicity
• Not even Irishman goes to church before start of Yule
• Spotty doesn't cover all the ground presumably
• Irregular, as fog
• Like teenage facial hair, often
• At first, performance by hybrid yacht is variable
• Like many a teenage boy's facial hair
• Settle bill covering initial travel to Switzerland that's not consistent along the way
• Inconsistent chap, extremely tidy but disorganised