Replies

1. 
   MikeHennessy | Nov 22, 2005 04:06pm | #1

   Chances are that they will disappear after sanding and finishing. Try wiping a little water or alcohol on the piece and see if they don't blend in. If they go away when wet, your finish will likely take care of it.

   Mike Hennessy

1. 
   SgianDubh | Nov 23, 2005 01:02am | #2

   Actually Mike, polish alone is not likely to hide the mark in my experience. I found the 'oily' spots were actually highlighted, not hidden

   What's happened is that the plasticisers in the pads have transferred to the wood. The oily marks need to be removed. Lacquer thinner and other solvents will usually lift the marks, but even then it's important to be sure that the wood is clean before polishing.

   I had a similar experience a couple times with those open weave plastic sticky sanding pads you put on the bench under panels you are working on to protect the panel. It took a couple of goes with applying finish over the top of the spotty marks I hadn't seen before applying the polish before I twigged what was going on.

   That collection of sticky mats I'd bought went into the bin once I'd sussed out what they were doing to my finished work. Slainte.Richard Jones Furniture

1. 
   Elcoholic | Nov 23, 2005 04:12am | #3

   Ditto on both points.  Especially the rubber pads for Pony pipe clamps.  They even react with finishes.  Another disaster to avoid - I covered the faces of my K Bodies w/ felt for assembling pre-finished chair parts.  The felt stuck to the finish even though it had cured for over a week, what a mess.  I'm thinking of trying leather next.John O'Connell - JKO Handcrafted Woodworking

   The more things change ...

   We trained hard, but it seemed that every time we were beginning to form up into teams, we would be reorganized.  I was to learn later in life that we tend to meet any new situation by reorganizing; and a wonderful method it can be for creating the illusion of progress while producing confusion, inefficiency, and demoralization.

   Petronious Arbiter, 210 BC

1. 
   SgianDubh | Dec 05, 2005 03:36am | #4

   Occasionally John I've seen something like a telephone, stereo system or an alarm clock with the rubber feet leave four divots or craters in long cured finishes such as pre-cat or nitro-cellulose lacquer where the feet have sat for quite some time-- weeks or months I'd guess, or perhaps even longer.

   So your observations concur with mine. The particular plasticisers in those feet affected the polish-- essentially dissolving it.It's just something to be aware of and avoid if possible. Slainte.Richard Jones Furniture

1. 
   user-61121 | Dec 05, 2005 05:07am | #5

   Those marks, or divots are actually caused from molecular migration.  The gas molecules from plastics and rubber will migrate to the finish (either solvent or water bourne) causing the finish to reamalgamate and soften.  I recomend not using these things.....even some types of pads that are purchased as "felt" can be artificial substances made from plastic.  Michael "Wood Doc" Philipps

2. 
   mike4244 | Dec 15, 2005 05:03am | #6

   John' I had to laugh when I read your post. I used the felt with the psa backing on pipe clamps. Red felt fibers on a mahogany reception desk wasn't what I wanted. Luckily I could scrape it off without damage.I tried heavy gasket paper, the real thick stuff is about 3/32" ,worked good. I imagine even shirt cardboard would work as well as leather.

   mike