Author Topic: MDF and Masonite? (Read 7787 times)

Annie. · **Reply #15 on:** September 27, 2015, 02:03:18 PM

Thank you for your reply Kathy.

Can marine varnish (as in boat being waterproof?) be apply to either a painting done in oil or acrylic? My daughter mostly uses acrylic these days, but she had painting in 'water-soluble' oils before.

Val · **Reply #16 on:** September 27, 2015, 02:14:40 PM

If you want the wood to survive for a number of years, seal the wood with a good epoxy coating. (like West System) 2-3 coats is ideal. Light sanding between coats. Keep in mind that you MUST paint over the epoxy as it has no UV inhibitors. This can be done with just paint, varnish, or a combination of good marine varnish over the paint to help protect the paint from UV. You will need to recoat the varnish every year or two to maintain protection.

My old boat that we lived on up in Lake Ontario, Canada for 17 years had a lot of exterior wood. We were laughingly referred to as 'The Gold Plater' due to her varnish work.

KathyKuz · **Reply #17 on:** September 27, 2015, 05:22:58 PM

Val; That's the perfect solution. Varnish over the painting. Kathy

Annie. · **Reply #18 on:** September 27, 2015, 10:52:42 PM

Perfect! Then, that is what we shall do.

In Summary:
wood - I assume that plywood, smooth one side, is fine for this project
epoxy (West System)- 3 coats both sides
gesso - both sides, this way I know all the epoxy surfaces will be covered
painting - likely acrylic (Golden is her favorite)
marine varnish - both sides, repeat every 1-2 years (I will figure out what marine varnish is when I get there)

If you see any problems with above, please let me know. Without your help, Val and Kathy, I would have done this completely wrong.

With my sincere appreciation, thank you

May lynn · **Reply #19 on:** September 28, 2015, 02:52:18 AM

Dear Friends,

I purchased a product called G2S Crezone, at Home Hardware.

It has a masonite back and front with a plywood core. It was recommend
to me by a signpainter. Prep is easy just Gesso (1 or 2 times) and then paint
to your hearts content. Both the back and front are smooth surfaces. The cost
per 4 X 8 sheet is approx. the same as a 'good' sheet of plywood. The Hardware store
will cut it to your spects. They even sell 1/4 or 1/2 sheets. Nice product!!!!

I hope this helps.

May lynn

Val · **Reply #20 on:** September 28, 2015, 03:09:50 AM

Be sure to seal and protect the edges as well.

May lynn · **Reply #21 on:** September 28, 2015, 04:03:44 AM

Thanks, Val, for the Hint. I'll do that.

May lynn