Painting over Kiwigrip

About 5 years ago I did my nonskid on my J 29 with Kiwigrip. Last year about this time I took an extra sea hood mixed in 2 tablespoons of Intergrip per cup of Kiwigrip coated the sea hood let it set out side all winter. I checked it regularly to feel how well it had adhered and how well it worked when wet. I then gave my J 29 a coat. It’s held up well and has very good adhesion. I’ve done a few boats and I’ve gotten good enough at it that it looks OEM. But I don’t like it and it bugs me. I want to sand it with 60 grit which won’t remove it but will knock it down pretty good. I don’t have the high peaks and valleys that most get. I then want to use Perfection and the soft sand. I’ll use the Epoxy Primecoat primer then Perfection. My research tells me the Kiwi Grip is an Acrylic Polymer and it can be painted over. Has anyone painted over Kiwigrip ? I’ve come across a few posts in other forums that have done it with Brightside.

 

Or can I paint over the sanded Kiwigrip with Interlux Interdeck?

 

Any paint job is only as good as the substrate under it.
Make sure the paints you want to use are compatible.
I would only use a quality 2 part paint for nonskid, I’ve never seen a single part paint that was tough enough.

 

The classic way to do a compatability check is to purchase the new paint's recommended thinner. Then, soak a rag with that thinner and place it over the top of the new paint, then cover the soaked rag with plastic and tape and make it so the solvent won't easily flash off. If, after say overnite, the substrate has not been solved or lifted or peeled, then the new paint can be applied. If the solvent flashed off; it wasn't covered well enough for the test.

If you want to know the bond strengths of the two paints; reference the tds of each.

My boat has kiwigrip and it performed well this year on light use.

 

A few weeks back I sanded my sea-hood that has KiwiGrip on it with 80 grit and gave it a good scrubbing. I then painted it with Interlux Interdeck which is a one part paint. I realize a two part like Perfection would have been optimal. I talked with Interlux and they were concerned with the chemistry of the two part going over a water based (KiwiGrip) paint. In my research one can paint a Polyurethane paint over a water based paint. So I did a coat of Interlux Interdeck on my seahood. The Interdeck instructions say if the substrate is adhered well it doesn’t need a primer. It went on very well and adhered nicely so I gave it the second coat. I then let it sit a few weeks. I then painted the cabin top. Time will tell if it’s gonna come off.

 

Looks great