Reddit reviews Martin/ F. Weber Bob Ross Cleaning System (R6524)

I have both linseed and thinner but I usually just use my thinner because I already have it out. And you are correct its the same stuff that you probably use to clean your brushes. When I say thinner I mean Odorless Mineral Spirits.

This is what I use but from what others have said any kind of odorless mineral spirits will work. Apparently some are more odorless than others but I wouldn't know.

There is a Bob Ross brand odorless mineral spirits if you wanted to stick with the bob brand

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Also there is this stuff called Gamsol. I have read conflicting arguments whether or not it works better than regular odorless mineral sprites. Its more refined I think? I don't know hopefully somebody more knowledgeable can chime in.

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If you have the time this Tree and Bush tutorial shows how and why you need to thin the paint to add layers.

You probably don't need the chip resin brush for either of those paintings, but it wouldn't hurt to own one. The master set comes with a #2 script liner so you don't really need to buy another one. It also comes with a 1" landscape but if you have the money to spare it's really convenient to have two 1" and 2" brushes so you don't have to constantly clean them. (one with the darker shadow color and one with the highlight color, usually).

The only thing I don't see on your list is the beater rack and a trash bin to set it in. The beater rack is what dries the brush, unless you paint in an area where you don't care about paint splattering and can just dry it on the eisel like bob does. It can also be bought in a combo pack that comes with the screen, bucket, and thinner.

There are also some colors that don't come with the master set that bob uses often. You can definitely get by with the colors in the set, but you may want to check the beginners guide and see if you want any other colors.