Paint problem Aluminium boat

Aluminium boat, the paint has gone milky after 2 years in patches also Orange Peel(Guess thats always been). Any ideas on cause of this problem please ?

 

Without a lot more information, it's difficult to make any recommendations, but the obvious questions are, what type of paint, what conditions has it lived in, etc. It looks to be some chalking, which might just buff out. Have you tried to buff it?

 

Who painted it? The builder or a previous owner?

 

No cant buff out, it was painted by the builder. There are 2 boats but only one gone like this, the other is fine. They were not sprayed at the same time, my impression is this boat was sprayed when humidity was high or someone dropped a can of thinners or something and tried cleaning up.
Maybe they cleaned up wearing gloves as in one area it look like a glove or material print...contaminated cloth or something.

 

Why can't it be buffed? If it was sprayed, it was with a partly plugged gun or something, as that stipple looks worse than a lousy roll and tip job. If it was mine, I'd just repaint as the finish looks like crap anyway, in spite of the cloudiness.

 

This boat is 2 years old and this is only showing up now, the boat is in Holland so i can only go on what the client is saying that it wont buff out.

 

I have had similar milky patches on interior before that was due to spraying in high humidity.

 

PAR's right, it should improve by compounding

May be a language barrier,

Be specific;- ask them to gently hand flat, using some 3M P2000 or P2500 wet and dry with warm water an a little simple green, ideally somewhere inconspicuous.

If it's modern 2 part paints, those are much harder than the traditional paints and using a basic cutting compound will hardly touch it, especially if done by hand.

 

The handrail in the second picture post is not likely a factory issue, not after 2 years

I've seen something similar before - Are the boats on fresh water....
with mosquito's....
The common bug sprays with high levels of DEET will eat into the surface of some paint like paint stripper

 

Is it aluminium ? Doesn't look like it. Maybe clear coated ?

 

Yes its Aluminium..more photos

 

Yep, that's my thinking too Andy. I'd start by roughing it in with a 1,500 pad, moving up through 3,000 and seeing how it looks. If you're real anal about it, pull out the 5,000 grit pad and have fun, before the fine polish comes aboard. I know some say you can't buff some of the LPU's but I'll be damn if I've found one yet, that doesn't respond positively to some surface smoothing, so long as it's fully cured and performed correctly (speed, products, etc.).

 

Has the boat been covered with a tarpaulin? This can cause this. You say the boat is in Holland...which implies it has travelled...which does actually imply it may have been covered over in transit

pps it may not easily buff out. It can be sometimes 'deep' in paint ie too deep to get rid of without sanding with something like p600.

 

Hi steve123, this looks like paint oxidization to me, perhaps the builder used a better priced 2k paint rather than a PolyUrethan paint.

Ask the gent to spray hairspray on the area then take a picture as he doea it, then after it dries. If the paint goes dark during, it just need topping off with lacquer from a body shop, if it doesnt do anything then youre looking at repainting the sections.
If the colour stays dark after the hairspray dries, then youre only looking at a cut and polish.
Hope this helps
Source: i spray paint boats