2K FINISH

General Discussion
1

Hello everyone, I’m wondering if someone who finishes thier boards with 2K over epoxy, can tell me how fine they sand the fill coat before spraying the 2K.

Thanks

2

From Resinhead with love:

http://www.swaylocks.com/forums/2part-automotive-clear-coat-how-i-do-it-picture-essay

3

Thanks for the link, I enjoyed reading that, very clear instructions. I wonder though, how he treats the rails, tape them off at the apex and sand off the resulting line of

finish? or just spray and deal with the overspray.

4

There was a thread on this earlier(a month or two ago). Hopefully he won’t mind me mentioning this, but contact Chrisp. He’s used the Spraymax 2K and could probably help you.

5

I dont tape off or anything fancy…just spray enough so it doesnt sag or run, flip and do other side.  Then I sand the rail with a conforming sponge (3M) …they call it very fine, I think its about 600 grit or so. It’s plenty to take off the overspray and blend in the 2 finishes. The nice thing about automotive stuff is it blends in really well, and some stuff is even made for repair blending…meaning it really blends in well. just wet sand to 600 and polish with polish stuff,

your first question…if you are still reading this. I snad the hotcoat to 220 or maybe 320.  I use a Scotch 3M red pad (which is called very fine). That preps the surface for any pinlines of paint work to be done. It is fine enough so there is no bleed under tape, and its fine enough so the 2K fills any scratch & voids.    Hope this helps. Just follow the 2K instructions…same as auto primer.

6

Thanks for the reply Resinhead, I shot the two boards I’ve been working on today and got lots of pinholes. I’ve read everything I could find on the subject but have yet figure out the cause. I’ve tried filling them with everything from resin to Solarez to clear grain filler, all of which leave large goobers that are hard to sand. Both these boards have veneer decks which seem ok, that is few pinholes, and then bottoms that have a layer of Inegra between two layers of four ounce glass and the bottoms are loaded with pinholes. After another sanding tomorrow, I’ll try putting fisheye eliminator in the clear and see if that bridges the pinholes. By the way, I tested the boards by bringing them from the cool shop out into the warming sun and then sprizted them with soapy water and they don’t appear to leak.