Today I applied a thin coat of sanding sealer to the outside of my 1.5mm ply and left to dry for a couple of hours. Gave a light sand and came up super smooth. Applied another coat and left for another couple of hours. Now when I try to sand it clogs the sand paper up almost instantly and leaves marks on the finish.
Can someone help?
Hi Gas
I read your original posting with much interest. I would like to offer a different angle on your topic:
I say that because I don’t see any mention of the actual abrasive used in the “sanding process” and yet it makes such a BIG difference.
I accept that it really does pay to allow the opted sealer to harden sufficiently prior to cutting back as previously mentioned.
However, if you are using cheap abrasive papers dry with no lubricant, they will I suggest likely clog quickly and those deposits risk spoiling the finish as they form hard spots on the “sand paper” and dig in.
In my experience of working wood to a perfect finish, the good old fashioned steel wool still has a lot to offer when used dry on well hardened finishes (especially shellac). Not so good though if the finish is still relatively soft or if there are sharp corners in which the steel residue can collect and stick.
One of the best modern abrasives I have used recently is the synthetic Abranet product. It cuts like a dream used dry, does not clog and lasts for an amazing amount of time. My Abranet is in grades from 240 grit to 600 grit which covers most of my wood work prior to really fine finishing.
Okay enough from me on this slightly different angle.
Cheers
Craig