Gelcoat chalking

[Guest]

Our boat is 30 yrs old and I have discoloured/chalky navy blue geloat on my topsides (although the white gel is fine). I have tried using cutting paste with and without a car polisher but to no effect. I have also tried rubbing a small patch continuously for 40 mins with paste to see if elbow grease alone was the key. Still no effect. I presume the discolouration is some form of oxidisation. Perhaps some chemical treatments are available? ( There is discussion on the noticeboard of professional valet type services. What do they use? Is commercially it available?). Any experience or useful tips gratefully received before I admit defeat and paint it.

 

[bedouin]

When asked elsewhere, others have recommended a product called 'Polytrol' with an evangelistic zeal that rivals Depsol on Soltron.

I've no personal experience of this product but it must be worth a look.

 

[Piers]

Try calling Peter Furby of 3M Marine products (he is always willing to talk to Forum members) and explain the problem. Knowing Peter, he will be able to help. Tel - 07770 284926.

The cutting compounds used are critical. Incorrect products can ruin surfaces. I have used his products on my boat, which has dark burgundy topsides, to quite stunning effect - from white bloom to original brilliance.

Piers du Pré
MBM Cruising Club enthusiast
www.dupre.co.uk/fsPlaydeau.htm

 

[pvb]

Aagghh!

I've used Polytrol, and wish I hadn't! Dark blue gelcoat looked marginally better for about a week, then started looking patchy. Better to do a proper job with cutting paste and then give it a really good polish.

Agree that 3M have some very good products. I've also been very impressed by Meguiars products.

 

[BarryH]

I use Farclea G3 compound to good effect. Must be applied with a damp polishing mop or cloth. Keep the mop wet with a water sprey to stop the machine burning the compound into the surface. Finish off with a good wax based polish to give final shine and seal. works well for me.

 

[quaelgeist2]

Don't know whether it could work equally well for you, but GRPro got back a shine on my 20 year hull. Just had it done and this week complete with deck and coachroof.

The bad part:
- It is not a DIY product, but is applied by professionals in a franchise system
- While here in Holland a guy asked for about GBP100 for the hull (and 200 for the whole boat), I have heard that his UK colleagues are not so modest in their pricing

You may want to check for a 'cash-pricing' with your local guy, though. Also, the buy here in Holland showed me on a small part first how well it worked - my wife took the decision then quickly ;-)

At the end of the day, what is a good look worth - TO YOU ?

have a good season!

chris

Afterthought: Why don't you plan asail to Holland this summer and have it done there. Just takes a few calls - mail me if you want the details of the rep in my area.