Giant Lapping Plate

[Ohio HD]

 

[PoorUB]

Spray adhesive can be removed with a razor blade and some brake clean or lacquer thinner. A laminate roller will help smooth out any bumps when gluing down the paper.

[turboprop]

Had not considered a laminate roller. Heck, until seeing it in this thread I had no idea such things existed. Learning has occurred. Thanks.

[Admiral Akbar]

1200 grit is way too fine. I use somewhere between 360 and 400.  With 1200 grit it will take forever and the surface will be too smooth. Any gasket will except for the foam viton coated aluminum ones can squish out.  Rougher finish holds them in place.  You going to special sheets that are big enough to get the whole surface?   For a primary gasket surface, I'd use a 14 inch mill file. 

[PoorUB]

Had not considered a laminate roller. Heck, until seeing it in this thread I had no idea such things existed. Learning has occurred. Thanks.

Contrary to the consensus I do come with with worth while info every so often!

[mrmike]

You may find that when your done those parts in your junk pile are no longer junk.

Mike

[98fxstc]

1200 grit is way too fine. I use somewhere between 360 and 400.  With 1200 grit it will take forever and the surface will be too smooth. Any gasket will except for the foam viton coated aluminum ones can squish out.  Rougher finish holds them in place.  You going to special sheets that are big enough to get the whole surface?   For a primary gasket surface, I'd use a 14 inch mill file.

Agree with Max on this

I read above where you could buy belts in 18" or 24" width ?
I would consider cutting the plate in half  18" x 24" (maybe a bit late for that now)
would work better swapping grits and should be big enough for most work
36" x 24" is pretty big, how often would you need it compared with the convenience of grit availability and changeover ?
FSG suggested holding the grit in place with WD40,
Haven't heard of that before but it would be great if it worked (suction?)

I did my primary cover a while back by laying it flat on a laminex bench top in the kitchen and taking the high spots with a file with multiple checks
then finish with a block and 600 paper

[turboprop]

1200 grit is way too fine. I use somewhere between 360 and 400.  With 1200 grit it will take forever and the surface will be too smooth. Any gasket will except for the foam viton coated aluminum ones can squish out.  Rougher finish holds them in place.  You going to special sheets that are big enough to get the whole surface?   For a primary gasket surface, I'd use a 14 inch mill file.

Yea, 1200 might be too fine. Have never done this before. Figured it would be best to start fine.  Keep the info coming.

[ecir50]

well that all depends how messed up the part is. It's like polishing a part or painting start with the roughest you need and work your way up. I would go 100 on one side of the glass and 220 on the other. 

[ecir50]

use some store bought grits to play with on a scrap piece of aluminum.

[kd]

Here you go.  Exact fit size of double sided adhesive for $6.20 each.  An internet search found lots of other options from the glue stick applicator like you use at your desk for paper, on to spray, and on to this type of material in the link.

http://www.artgrafix.net/store/product1805.html

[FXDBI]

Here you go.  exact fit size of double sided adhesive for $6.20 each.  An internet search found lots of other options from the glue stick applicator like you use at your desk for paper, on to spray, and on to this type of material in the link.

http://www.artgrafix.net/store/product1805.html

  perfect!   Bob

[turboprop]

Wow. And only $156.00. I will probably start off with some spray adhesive just because I am cheap. But will keep this in mind as a contingency if the spay does not work out.

[FXDBI]

Wow. And only $156.00. I will probably start off with some spray adhesive just because I am cheap. But will keep this in mind as a contingency if the spay does not work out.

  missed the 156 bucks , be much cheaper to just run strips of the widest 2 sided tape u can get for a reasonable price.  Good luck with the spray adhesive was 20yrs ago since I tried it and adhesives have come a long way.  Bob

[kd]

Still only $6.20 per sheet.  I'd say a long lasting supply of 25 sheets if you do a lot.  Maybe they would sell you a sample pac with fewer sheets.

[Coyote]

Why not just try hair spay?

[turboprop]

Why not just try hair spay?

Great idea. I bet my wife has some.

[FSG]

Why not just try hair spay?

  works well on Grips,  it wasn't available in the Oil Patch so we used WD40 but it may well be available today   

[wfolarry]

https://www.homedepot.com/p/Diablo-12-in-x-18-in-20-Grit-Sanding-Sheet-with-StickFast-Backing-5-Pack-DCS120020P01W005/202875371?mtc=Shopping-B-F_D25T-B-D25T-25_7_POWER_TOOL_ACCESSORIES-Multi-NA-Feed-PLA-NA-NA-PowerToolAccessories&cm_mmc=Shopping-B-F_D25T-B-D25T-25_7_POWER_TOOL_ACCESSORIES-Multi-NA-Feed-PLA-NA-NA-PowerToolAccessories-71700000056728358-58700005290277020-92700046897694916&msclkid=6c7be0349728199ec4bfbd9f09025765&gclid=CLTsxPi-qeUCFYbTDQodV3sMoA&gclsrc=ds
Just a thought. I used something similar on my granite plate years ago. I thought I got it from Goodson but I didn't see it in their catalog.
When you're sanding & trying to get it flat you can go too far very easily. I was doing some cases for an old motor that the customer was anal about getting it to stop leaking. I told him there might be problems. There were. Cometic saved the day.