Model Boat Mayhem - Forum

Technical, Techniques, Hints, and Tips => Painting, Finishing and Care. => Topic started by: boxer on November 13, 2018, 07:29:08 AM

Title: Waterproofing card
Post by: boxer on November 13, 2018, 07:29:08 AM
for parts of the superstructure on a warship I intend to use card

Waterproof same way as say balsa wood?

Sanding sealer
Poly c

Prime and paint

Any other methods

Title: Re: Waterproofing card
Post by: Brian60 on November 13, 2018, 08:00:53 AM
My tramp steamer (link in the signature line) was built entirely of balsa with hull plating done in card. All I did with that was to coat it with Ronson's Woodseal for dryrot treatment, I only used this because it soaks in and adds a chemical stiffener to the balsa and card, making them much stiffer, the added benefit is that its also a waterproofer. Then primed and painted it with Plasticote enamel spray paint. Its still looking good after a couple years but admittedly not been in the water very much.
Title: Re: Waterproofing card
Post by: dougal99 on November 13, 2018, 05:03:44 PM
I used the sanding sealer and paint method on a tug superstructure, that was removable and it lasted several years. It was finally replaced with plastic because of wear and tear not water damage.
Title: Re: Waterproofing card
Post by: ballastanksian on November 14, 2018, 10:03:32 PM
Glynn Guest swears by card for his model boats and uses two or more coats of thinned dope and then thicker coats with sanding in between. You can get non shrinking dope from good modelling suppliers. Sanding sealer and Woodseal also sound like excellent ideas for you to try.
Title: Re: Waterproofing card
Post by: JimG on November 15, 2018, 01:42:00 PM
Brushing epoxy will soak into the card surface to give a hard shell. Adding some microballoons will give an easily sanded surface that is perfect for painting.