Perfection PU painting question

[Copacabana]

I'm hoping I can get some advice before I paint my boat next month. 4 years ago I painted the topsides with Perfection PU paint (after a proper sanding and primer coat with EPA primer). The paint is OK (some scuffs) and since I'm going to haul the boat I might as well paint it again. My question is, can I just sand the old Perfection and paint over the sanded and cleaned surface with more Perfection? Or do I have to sand and primer again? The current coat of Perfection is not chipping, flaking or showing any signs of poor adherence.

Thanks in advance!

[GordMay]

Perfection “...can be applied directly over two-part catalyzed coatings, that are in good condition, by cleaning with Fiberglass Surface Prep YMA601.
Sand with 220 grit paper. Remove sanding residue with Brushing Reducer 2333N. Perfection should not be applied over conventional single
part enamels since the aggressive solvents in Perfection solvents in may cause lifting. Care should be taken not to sand through the old coating ...”
➥ http://www.yachtpaint.com/Literature...fo-usa-eng.pdf

[Copacabana]

Originally Posted by GordMay

Perfection “...can be applied directly over two-part catalyzed coatings, that are in good condition, by cleaning with Fiberglass Surface Prep YMA601.
Sand with 220 grit paper. Remove sanding residue with Brushing Reducer 2333N. Perfection should not be applied over conventional single
part enamels since the aggressive solvents in Perfection solvents in may cause lifting. Care should be taken not to sand through the old coating ...”
➥ http://www.yachtpaint.com/Literature...fo-usa-eng.pdf

Thanks Gord! For some reason I couldn't find that information on the Brazilian International site.

[SVTatia]

Copa, I am just curious... did you spray or used a roller/brush?
4 years seems to be a very short time for an LPU paint to last.

I'm asking because I was doing research on a two paint system that I could be rolled and is repairable. My choices came down to Imron or Alexseal, since Awlcraft cannot be rolled.

I have since given up, Imron MS600 is not available in Canada and Alexseal is very expensive. I am now switching to Epifanes, for which I have seen stunning DYI results and although it is an LPU I saw a boat that had a patch fixed and it looks impressive. BTW, I have painted a whole boat and deck (my previous) with Awlgrip before, good paint but not very forgiving.

[Copacabana]

Originally Posted by SVTatia

Copa, I am just curious... did you spray or used a roller/brush?
4 years seems to be a very short time for an LPU paint to last.

I'm asking because I was doing research on a two paint system that I could be rolled and is repairable. My choices came down to Imron or Alexseal, since Awlcraft cannot be rolled.

I have since given up, Imron MS600 is not available in Canada and Alexseal is very expensive. I am now switching to Epifanes, for which I have seen stunning DYI results and although it is an LPU I saw a boat that had a patch fixed and it looks impressive. BTW, I have painted a whole boat and deck (my previous) with Awlgrip before, good paint but not very forgiving.

It was sprayed, but not very well. I'm going to be painting other parts of the boat so I thought I'd just paint the topsides again. It still looks OK.

[psk125]

"scuff marks" can also come from bumpers, dinghies, launches and lines chafing on the painted surface, even when the paint is new. If you scrape at it long enough, no paint is going to hold up. More than 10 years later our 2-part poly deck still looks fine - except for the places that have had wear on the surfaces.