wetsanding with drywall screen?

General Discussion
1

Anyone ever try wetsanding with drywall screen?  I had a bunch of 220 screen, and was getting real low on 220 wetsand paper.  I had a gloss coat that came out a bit lumpy (probably should have waited for a warmer day).  I was hand sanding with 100 grit dry, but the going was slow, and it was leaving a pretty scrached up surface.  Since I had a boatload of the 220 screen (last time I went to pick up a few the large pack was all they had in stock), I thought what the heck, I'll try it.

It went down fast and smooth, leaving an overall satin finish, no real scratches, in very little time.  I was pleasantly surprised.  So I'm wondering, is this a bona fide use of 220 sanding screen, or some kind of fluke.  Anyone else ever try it?  What kind of results did you experience?

2

…hello,

I dont know your sanding technique, but is all on that

technique and the right tool, the right tool is an angular sander; due the weight, power, speed, triggering tech, etc.

the screens are somewhat “brute” in comparison to sandpaper, for ex for the curved surfaced

and we have a lot in a board.

you say gloss coat, you can barely force a sandpaper on a gloss coat…that s an appropiate technique.

3

I need a translator!  haha - not really, I got the point you don't like it, your way is better, etc.

It works for me.  Your mileage may vary. 

Of course, a good gloss coat, I wouldn't need it.  I assume your gloss coats come out a little better.  Mine sometimes do LOL.

4

…my point is not that “my way is better”

is that there s proper technique and tools and other tools and methods…

to build a board in a professional way without too much pain you only need the basic tools and some experience or fine advice to avoid complications

I tried to tell you 1 polishing technique in previous comment but if you prefer to use the screen or whatever its ok

5

Sorry, don't take offense, I really didn't fully understand your comment.  The board was not ready for polishing.  It had to be sanded.  My point was just that I had found a hand sanding method that worked for me, the question was if anyone else had tried it.  I just glassed my 6th board.  Every one has gotten better, and easier.  I'm still a ways off from anyone in your league.  If you have a sanding technique that is superior, great, I'd love to learn it.

6

It would be near impossible to polish a gloss coat if you started out with 100 grit(the scratches are too deep). I'd sand it off and re do your gloss. then sand with 400 then 600 then rub it out to a nice clean shiny finish. start with 320 if it still came out a little less than perfect. as for the drywall screen, I've never tried it, maybe it doesnt clog as easy as sand paper. It could last longer?

7

hey Huck

so you used 220 screen ,wet, to even out a gloss coat,,,yes?

did it actualy even it out completely?

or did you just hit the hi spots

when I have abnormalities that are high from adding in a split slab (hey it happens)

I hit the high spot with 220 then 320 then 400,,, blending of course

the best thing Ive learned for glossing is temp control must be over 72 deg but not over 80deg

and make sure the resin is warm also

when its cold ,,it slabs off the rails,, (splits)

8

[quote="$1"]

It would be near impossible to polish a gloss coat if you started out with 100 grit(the scratches are too deep). I'd sand it off and re do your gloss. [/quote]

you're catching on!  maybe I didn't say this in the beginning, but the gloss coat didn't come out smooth.  It was lumpy.  Had to be sanded.  I know how to finish when it comes out right LOL  What surprised me was how thorough, effective, and quick the screen worked to even it all back out.  Its ready for a proper gloss now.

and yes Ken, temp was the issue!  I had the space heater on, but didn't warm the room first.  I tried to compensate with a bit extra catalyst, but it just kicked off too quick, then took forever to set up.  Made me think about a story you told me, but you were quicker to figure it out than me.

9

     Howzit astevens, I agree about using 100 grit sandpaper but I do know a veternglasser who does use it. I would never use it and I usually start with 360 grit but in extreme conditions I have used 220 to start with and that is to gritty for my tastes. I an ideal world I would start with 400 and finish with 600 then go to compound. Aloha,Kokua