Painting Hull With 2 Pak

[runamuk]

Hi all,

whilst i finish off my project berty 20 and await some more funds to buy a new sterndrive, im tossing up the idea of painting the hull midnight blue as it has been painted in the past and looks pretty ordinary.

My question is after all the prep work and sanding is done, do i have to prime the hull as it is already painted and can you roll and brush 2 pak on for a top finish as i dont have access to booth's and spray machines.

How would it look being rolled and brushed?

Cheers

Dave

[olitay]

Hi mate, I once rolled my boat with International brand paint and whilst it went on a bit streaky it dried really nicely.... i got a little orange peel effect in the end, but you would never have known it came of a roller.

[tuna1]

If the paint is 2pak on the boat now you can rub back with some 800wet and dry paper with water of coarse and spray 2pac onto it but if its acrylic you will have to use primer because they are different paints if the paint is old and flaking then proberly best to start from scratch with the sander with 320 on it and give it a good sand its a lot of work and then primer its up to you as for roller you can paint 2pac with anything once you mix the hardener with the paint it will go off but if you want a nice finish on your boat spraying is the only way to go hope this helps.

[ant180]

I am assuming your chosen colour is a solid and not a metallic? Metallic can be done, but is extra work for someone who isn't experience with painting.

Berties are fibreglass hulls, right?

If so, you are painting over gelcoat. You can scuff and shoot 2K solid straight over it, but personally, I'd wash and scuff the whole surface you intend to paint with a scotch brite pad, Morning Fresh dish soap and water. This will remove any grease or silicon, which the primers and paint won't adhere to.

Sanding the cleaned surface with 320 grit on a pneumatic orbital (whizzer) is best, followed by a good clean with prepsol, and then epoxy sealer, eg Protec's Epotec.

The epoxy isnt totally necessary, but helps seal the fibreglass if the gelcoat isn't perfect. It also ensures good adhesion and a solid foundation for the paint. I would definately recommend it! Stay away from high fill style 2K primers, they are too porous for use on a boat.

If you choose to epoxy the hull, let the epoxy cure for a few days. Then sand with 600.

Prepsol the hull thoroughly, and allow a good hour or so for the prepsol to totally evaporate. This is VERY important, as any remaining prepsol can interfere with the 2pack.

You are gonna need a gun with a big cup for that boat, and will still probably need a helper to mix paint etc as you spray.

I would suggest investing in a decent gun, eg a good Devilbiss or Anest Iwata. Cheap spray guns are much harder to get a good finish from! You will also need a good sized compressor. Spray guns eat a LOT of air!

Don't even consider doing this without investing in a top quality respirator from 3M at a minimum. The Isocyanates from the paint are not good for your health. Remember, you are not in a booth, and the overspray will be hanging around. It is also technically illegal to apply 2pack outside a booth.

If you have any questions feel free to PM me.