Help!!!. I glossed my first board today and had a few problems. I have got some lumpy spots and what look like brush marks. I hit the worst lumps with some 220g and I was able to smooth them out. But I can see the streaks are going to be more of a challenge. Here are my questions…
Should I sand the whole board with 220g first?
My sandpaper seems to loading up real quick with fine dust, is that normal?
Should I back my truck over the board and tell my friend, whom I’m making it for, that it was abused by ferel dogs?
The only way I know of fixing a lumpy gloss coat is sanding it off and redoing it or just a lot of sanding 320 400 and 600 grit paper, also use wet/dry paper and water if the paper is clogging up. Try not to burn thru. Good luck.
It sounds as though your gloss has been applied to thick and or gone off to quick to flatten out enough. It can be sanded back okay to a flat surface with 120 grit or finer, just don’t go overboard.Next you will probably have to do a double 600 w/d then 800 then to finish double 1200. This will give you a good result if you are carefull with your machining.I recommend a double polish to finish off.This is certainly a lot of extra work , but providing you don’t burn through the gloss it will look good.A good gloss takes time to learn.24 degrees is good temp; to apply.Lay it like your filler coat but but last end to end brush nice and fine.Hold your 4" brush by the very tip. Hope this info helps you out .
All this stuff about using 800 and 1200 is way over the top! People don’t even use grits that fine when they’ve got a nice gloss they’re preparing for polish. If you are using garnet paper,(the brown stuff) throw it out. If your gloss is reeeal bad, start with some 180 no-fill (the white or silver looking paper). Let the board lay out a day or two so that your messed-up gloss coat cures. You can use 220 no-fill if the gloss isn’t messed up too bad. Otherwise go from 180 to 220. Have air available to blow off the fine dust on you paper and the board. Since you have what amounts to an uneven gloss coat you would be better off to re-gloss. Don’t bother with wet and dry . Just get the poor gloss coat evened up and flat. No-fill paper will accumulate a fine dust on the paper that can be blown off with air. Unless you’ve got other problems relating to surfacing agent it should sand well. Once you’ve got it ready, gloss with finishing resin thinned out to what I call a “piss coat” 10-15% acetone. Cure it 24 hrs. and wey and dry in the normal procedue(usually 3 grits). If I’ve done a good gloss I usually start with 320 and water and move on to 400 and 600. It’s not always necessary to go to 600. 800 and 1200 are total over-kill. Polish it with a buffer and some #2 polish. McDing
Richard-----swayloicks is a great source that alot of us did not have, back a few years ago, so make good use of the archives. Most of us learned by growing up in the industry, picking up tips where ever we could or trial and error. Your attitude seems good, sharpen those sanding skills. Learn from mistakes. Dale Velzy once said ‘he even made money from his mistakes’. McDing
Well I went to town with my sander this afternoon. Sanded for almost 3 hours. 220g,320g,400g,600g all wet. It actually didn’t turn out too bad. Not perfect but not bad. Now I hope to put a decent polish on take some mental notes for next time. Thanks McDing.