Boat cleaning tips needed, Please

Hey all, I went to clean my 2006 X-Star for the upcoming season. I noticed the bad calcium deposits that built up over the year, I tried CLR 3/4 strength and full but no results I was wondering if anyone has any suggestions?

I also have old tire scuff marks on the side of my boat and I tried goo gone but again no results any sugestions on what gets rid of them?

Any suggestions are greatly appreciated!

Do you guys have cillit bang?
http://cillitbang.co.uk/index.shtml (it was easier than a pic)

I use the lime one neat with a cloth and just rub the boat down with it after I've washed and dried it, and then rinse it off. Not sure what it could do to the gelcoat though so I only use it occasionally and sparingly, but it leaves the boat looking new.

Can't help you with the tire marks though.

Couple of the boat owners I ride with swear by using toilet bowl cleaner to get rid of calcium, scuff marks, and discoloration. SnoBowl I think is the brand they use, and they don't do it very often, like only for a year-end detail. You'll want to dilute it down to a min of 50% with water and be sure you use some heavy vinyl dishwashing gloves. One of the guys put it on straight without diluting it and it melted part of the rub rail. Some harsh stuff, but made the stainless border around the rub rail shine like new...

aqua buff. google it. Took 16 years residue off reall nice like. needs an orbital buffer for sure.

I used Easy On and Off on some really old stains and it worked unbelievably! Sprayed it on, lightly brushed it, rinsed. Not sure how it would work on calcium, but for old boat scum, that's what I'm using.

Lime-Away- Works great, wont hurt your gel coat but will take ALL wax off so be prepared to rewax the boat. It will look a LOT better.

I can second the Lime-Away. But I have not tried CLR and thought they were very similar ingredients.

Depending on the stuffs you should be able to use acetone or lacquer thinner on a rag.