Colorsanding block question

T

TAguy16

I was just curious what folks on here use for a block for colorsanding (or wetsanding of clear) before buffing. I've almost always used the small flat 3M wetsanding blocks - I use the hard one with the texture on one side - because that's the what the guy that taught me to do this used, but it can be tricky to keep hold of the sandpaper with these. I've tried using the old fashioned rubber blocks (with the nails that hold the sandpaper in the ends that you lift up) once or twice but if memory serves I had trouble with the sandpaper backing balling up between the sandpaper and the block since with these the sandpaper moves a little between it and the block creating a little bit of friction which deteriorates the paper backing. Also it's a pain to get the sandpaper in and out of these things, which is a really bad thing since you are going thru so much of it. I've noticed there are some other blocks at the paint store that look like they could be used for this somehow, but I'm just wondering how others have approached this issue.

Thanks for any ideas>
 
I use this one to colorsand everything. It's a durablock roller block I believe they call it. I've got most every durablock made and this is the one I use colorsanding every time.. works like a charm brother
 

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Block in question is a Motorguard RL-1. I like it too but it may be a little soft if you have any urethane wave or heavy texture. A durablock hand block (same size as the RL-1 but stiffer) would be a better choice for flattening on flat to slightly curved panels. At least for the initial flattening then go with something softer like the RL-1.
 
Block in question is a Motorguard RL-1. I like it too but it may be a little soft if you have any urethane wave or heavy texture. A durablock hand block (same size as the RL-1 but stiffer) would be a better choice for flattening on flat to slightly curved panels. At least for the initial flattening then go with something softer like the RL-1.
RL-1 is a fairly large block: what size sandpaper sheet fits it, and then how do you hold it to the block? It looks like it's so big you have to use a full half sheet at a time (or half of a full sized sheet) and then you hold it to the block on the sides. Is this right?
 
Just a hand pad, it uses a half sheet of full size paper (9x11) or a sheet of half sized paper. Standard type block. Wrap it around the block and sand back and forth in a straightline. You don't want to crisscross or crosshatch when you are doing color sanding.
 
Block in question is a Motorguard RL-1. I like it too but it may be a little soft if you have any urethane wave or heavy texture. A durablock hand block (same size as the RL-1 but stiffer) would be a better choice for flattening on flat to slightly curved panels. At least for the initial flattening then go with something softer like the RL-1.

I also like the Motorguard RL-1 but only after the panel is flat and orange peel free. The softer block works great for the higher grits and forms to curves and concave surfaces.
 
This might give you some perspective on it's size. The spreader is a 5 inch one. The Durablock is the one I mentioned in the post above.
IMG_20180710_082053818_HDR.jpg
 
I looked at a hard Durablock yesterday at the paint store and the Motorguard version of it which was almost the same exact design and price. I don't know why they carried two products almost identical to each other. I'm starting to think I should have picked one of them up, but at the time I had a hard time visualizing how to divide the sandpaper up to use them so I felt I needed time to figure out if they were going to be useful for me. I've certainly spent my share of money on stuff that wasn't useful and it just ends up cluttering up the shelves in my shop..
 
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