Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Working vessels R&D: => Topic started by: cdnfurball on April 17, 2019, 03:07:44 am

Title: Paint over fiberglass
Post by: cdnfurball on April 17, 2019, 03:07:44 am
Hoping your experience can help a nubee.    My hull is planked, sealed and sanded 2 part epoxy. Then l used 3/4 oz fiberglass laid with the 2 part epoxy again.   I am wondering the best type of paint for the hull.    Thanks
Title: Re: Paint over fiberglass
Post by: dougal99 on April 17, 2019, 08:14:27 am
I use plastic undercoat and car spray paints with no problems. One boat is nearly 20 years old.  :-))
Title: Re: Paint over fiberglass
Post by: nemesis on April 17, 2019, 09:30:40 am
use a plastic primer first, nemesis
Title: Re: Paint over fiberglass
Post by: cdnfurball on April 17, 2019, 11:13:00 am
Thank you for the guidance.      What do you mean . " Plastic undercoat " ?
I have found in these forums, pending where on this plant you are located,  terminology can be different.



Thanks
Title: Re: Paint over fiberglass
Post by: JimG on April 17, 2019, 12:47:55 pm
Basically a primer paint intended for use on plastic parts in cars. e.g. car bumpers. (In the USA read fenders) It should bond better than a primer intended for metal.
Jim
Title: Re: Paint over fiberglass
Post by: NickelBelter on April 17, 2019, 01:33:57 pm
Here in Canada you can find Krylon Fusion paints which supposedly bond to plastics better than regular spraypaint.  Any spray primer will work just fine too. 
Title: Re: Paint over fiberglass
Post by: nemesis on April 17, 2019, 07:43:32 pm
Plastic primer etches the surface of the plastic or gel coat of a laminate therefore enabling the following coats to bond, done properly it is very difficult to scrape the paint off the surface. nemesis
Title: Re: Paint over fiberglass
Post by: coch y bonddu on April 17, 2019, 11:44:12 pm
Tbh you dont really need a plastic primer at all,this is simply because it is not plastic at ll but Grp,if you are at all afraid the primer will lift with I know it will not then in Halfords they sell an etch primer,apply this first then primer afterwards,in all the years of preparing grp panels for cars boats and actually planes I have never had paint peeling just using a normal primer,preparation is the key to success.30 odd years of painting experiance tells me this  O0 O0 O0 O0 O0 O0




Dave
Title: Re: Paint over fiberglass
Post by: derekwarner on April 18, 2019, 03:02:30 am
Thats what ..my dear old Dad always said......"[/size]a good paint job all in the preparation![/size]" O0 .................. Derek