After reading that sun damage account for 70% of wrinkles I started wearing sun cream every single day. That was ten years ago, and even though I live in the UK, even when it's cloudy your skin is burnt - even in winter. Thus I have using sun cream on a daily basis - usually factor 30, and never below.
The issues I have had with sun cream, however, have seen no end. Some have been greasy, too thick, don't rub in, leave my face a slightly grey/purple colour. It has been a very much trial and error situation.
In the name of beauty I've tried them all (Neutrogrena, Loreal, and supermarkets own-brands) The best is however, Soltan. It is awarded 'five starts' from the skin protection association which says it all for me. If you pick up a sun screen which has four stars or less you're simply not protected. This is imperative because without the five stars, in my book, you might as well just apply a non-spf moisturiser.
I recently read an article that sun creams aren't all they're cracked up to be, and without a number of ingredients (regardless of the star rating), the beauty industry is just taking your money.
The key ingredients to look out for inclide Titanium Oxide, Zinc Oxide, and Benzyone. Without these, you are simply not protected from UVB rays which are burning.
I consider the two types of damage as UVA (aging) and UVB (burning), as two seperate skin-harmers. If you're only protected against the one, you're skin will still suffer from damage from the other.
To ensure you are fully protected, you must use a suncream with any of the above ingredients in, it can be hard to remember however, so I just use Soltan.
There are a number of Soltan sun screens - only sold in Boots - but you need the Soltan 'high protection' one - it is the only one which contains titaniium oxide, and trust me, I spent a quarter of an hour scrutinising the back of all of the labels.
The product is quite thick so you only need a little bit, but it doesn't spread very far. For my face I use about a pea sized amount, but if it is sunny and I am wearing a bandeau top I always spread it on my neck and decolletage, for which a the size of a 50p piece will do.
To ensure you're protected try to apply the sun screen as soon as you're showered because it needs at least 20 minutes to sink in. I don't always have the time, but even if I slap five minutes before I leave the house, at least I will be protected once it has sunk in.
I will only ever use Soltan, unless I find another brand which has any of the stated ingredients in, and is maybe a little less thick. I wouldn't use it on the whole of my body, for this sole reason, but for my money maker, the slightly-thick sun screen works just fine, and keeps me protected.